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I just came back to a question of mine and tried to type two short comments on the two helpful responses. I had a bad user experience, from my perspective, when I could not type the second one in because 15 seconds had not passed.

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3  
It's already a feature. Oh, wait, do you want to remove the feature? Ah, magic 8 ball says [status-declined]. – Robert Harvey Jun 28 '11 at 23:50
9  
It is truly the worst bug (by design) in Stack Overflow. The timer resets every time it happens. – Lance Roberts Jun 28 '11 at 23:51
    
But it warns you in its own cryptic way – juanformoso Jun 29 '11 at 0:00
1  
If you can type two responses within 15 seconds, do you really think those responses are "productive"? – raven Jun 29 '11 at 0:08
    
@raven, I figured that was the counter to my request - in this case it was basically to give a little appreciation to the answer that was not really better or worse than the one I checked. I assume the whole thing is in the prevention of spam bots, and the low timeout makes using captcha irrelivant.. – Aaron Anodide Jun 29 '11 at 0:19
19  
It's not the 15 seconds that is aggravating, it is the timer reset if you retry in 14.5 seconds instead of 15. (one thousand one, one thousand two, one thousand three...) – Robert Harvey Jun 29 '11 at 1:29
    
I agree with both Roberts here, it's more useful than harmful and should stay. 15 seconds are really not that long. – Shadow Wizard Jun 29 '11 at 14:35
    
Should be 10 seconds not 15.... – Adel Feb 16 '13 at 1:53
up vote 11 down vote accepted

The misuse of comments starts with users who post endless "me too", "I agree", and other such banal chit-chat. Having said that, if you really did post two consecutive, useful comments in 15 seconds, that is an unusual edge case.

Stack Exchange is a wide-open and largely anonymous public forum. As such, one of our best defense against wide-spread misuse, spam, and overt vandalism is to throttle EVERY activity users can perform to a reasonable, human level.

I believe that any possible inconvenience you experienced by having to wait a few extra seconds to post another comment is trumped by the damage that someone could cause if they raced through the system posting:

F YOU GUYS! – Robert Cartaino♦ 15 seconds ago
You – Robert Cartaino♦ 15 seconds ago
moved – Robert Cartaino♦ 15 seconds ago
my – Robert Cartaino♦ 15 seconds ago
cheese – Robert Cartaino♦ 15 seconds ago
so – Robert Cartaino♦ 14 seconds ago
I'm – Robert Cartaino♦ 14 seconds ago
taking – Robert Cartaino♦ 14 seconds ago
my – Robert Cartaino♦ 14 seconds ago
ball – Robert Cartaino♦ 13 seconds ago
and – Robert Cartaino♦ 13 seconds ago
going – Robert Cartaino♦ 13 seconds ago
home – Robert Cartaino♦ 12 seconds ago
you – Robert Cartaino♦ 12 seconds ago
butt-monkey – Robert Cartaino♦ 12 seconds ago
scum – Robert Cartaino♦ 11 seconds ago
laterz – Robert Cartaino♦ 11 seconds ago
lamerz – Robert Cartaino♦ 10 seconds ago
OMG – Robert Cartaino♦ 10 seconds ago
u – Robert Cartaino♦ 10 seconds
n00b – Robert Cartaino♦ 10 seconds
STFU – Robert Cartaino♦ 9 seconds u
d1dn7 – Robert Cartaino♦ 9 seconds
qu0t3 – Robert Cartaino♦ 9 seconds
|\|um4– Robert Cartaino♦ 9 seconds
|\|um4 – Robert Cartaino♦ 9 seconds
|21t3 – Robert Cartaino♦ 9 seconds
OMG – Robert Cartaino♦ 9 seconds
FU!!1" – Robert Cartaino♦ 9 seconds
ciao – Robert Cartaino♦ 8 seconds ago
n00b – Robert Cartaino♦ 8 seconds ago
suxzorz – Robert Cartaino♦ 7 seconds ago
1 rulez!!!!!11!!!1 – Robert Cartaino♦ 7 seconds ago

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2  
It's hard to argue with such an eloquent illustration. – Robert Harvey Jun 29 '11 at 2:06
2  
Yea, but other throttles are relaxed based on rep. – Rosinante Jun 29 '11 at 2:13
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I almost never hit the 15 second timer. But when I do, I'm usually very upset about not being to guess 15 seconds very well. Several times. – sarnold Jun 29 '11 at 2:18
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@sarnold the first time I trip it I changeup and count to 20 next time. If I don't get it then I leave the comment in the tab and open reddit. By then 15 seconds are usually gone ;) – jcolebrand Jun 29 '11 at 2:39
    
@jcolebrand, ah, you've got a second addiction. That must help. – sarnold Jun 29 '11 at 2:40
    
@sarnold it does at times ;) – jcolebrand Jun 29 '11 at 2:48
    
some of us are touch typists, I get zinged by this all the time. – Lance Roberts Jun 29 '11 at 6:26
    
wow you got tool to generate those things? ;) – Shadow Wizard Jun 29 '11 at 14:33
    
That tirade represents the equivalent of 44 words in 8 seconds, or 330 words per minute. That's pretty impressive, Robert! – Kevin Vermeer Jun 29 '11 at 15:01

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