What kinds of "questionable" or "illegal" gaming have you seen on any of the Stack Exchange sites? How did you figure out that it was gaming?
I don't know if this would count as "gaming the system" but a recent example might be where I answered a question by Jon Skeet and he offered to withhold giving the check mark until I had hit my daily rep limit. That way the +15 would be added on top of the rep limit.
I have not seen this personally but I assume it would be possible for a user to post a question, then answer it with a zombie account, vote it up or accept it so that the zombie account now had enough rep to go on and function in the system to serve as an upvote machine for the user. If I am mistaken and this methodology is not possible, even better.
Well... The whole thing's set up to be sort of a game, so most of what comes to mind is probably acceptable usage (rushing to get a brief answer in quickly, then editing it, etc.)
Undesired gaming usually tends to be subtle; otherwise, what's the point? But i do recall seeing a question where the author promised - in the question text - to upvote anyone who posted anything in reply. I don't believe that worked out so well for him though...
Most gaming seems to happen when a question is fresh, old questions seem to receive less attention and people can not be bothered to game them.
I see this happen sometimes:
- Post bad/funny/incomplete answer quickly
- Get down voted to -1
- Correct answer, get upvoted.
I also see tactical donwvoting happen sometimes (which has been discussed in another question, and IMHO is a really bad practice). Which is downvote good answers so your answer will be on equal grounds.
I personally will tactically upvote good answers, I try to upvote good answers on questions that I also post an answer, if I think my answer is better. It encourages participation.
I see people post vague/simple questions lots of times to attract lots of views and random upvotes.
I don't think it was intentional, but this question was just answered then closed by the same person 2.5 minutes later. I don't know if it's "gaming" per se, but it's questionable in my mind.
Update: It definitely wasn't intentional (you'll notice the answer has been deleted), but it's possible other people with intent and enough power can do this to game the system somewhat.