Yesterday I wanted to find an old comment of mine (with information relevant to a post I was composing), so I opened my All actions/comments profile page, and Ctrl+F'ed my way through the pages.
I stopped before reaching it, because I was flicking through the pages rapidly, and last time I did that, I was rate limited (IP blocked).
That story is relevant here, and it was recent. I joined a site, asked my first question, got my answer, browsed around, and very much enjoyed that site and its professional community. The site is still in beta, with the beta stats banner.
From there I found myself in Area 51, flicking through the past beta users of another site; mindless fun seeing who's been there since the beginning. And bam, IP blocked.
I copied the relevant information and e-mailed the on-screen address. No reply for some time so frankly I just changed my IP. 8 hours later I got the reply:
While we are unable to remove or raise the rate limit for you, the rate limit isn't something you should worry too much about. In most cases, the limit should already be removed automatically by the time you've received this reply.
Is it Area 51 only? Because frankly the sites I frequent, I flick through the pages a lot: new questions added, recent activity, checking how a comment thread is doing, opening new questions in separate tabs quickly, etc.
Twice it's happened while googling for hard to find stuff, Google would captcha me midway (despite being logged on to Google). Why doesn't SE implement a captcha when it senses rapid browsing?
So basically, should I be worried about how fast I use the site (excluding Area 51)?