This may be considered a meta question, if so please feel free to move it to the meta site, but I feel it doesn't match the requirements of the meta site because it's a general question about interviews that is applicable to any programmer applying for a job.
The reason I am submitting this anonymously should also be evident.
I recently started applying for jobs. One of the first ones I applied for asked me a series of questions, one of which was "Do you use stackoverflow? If so, what is your username?"
I'm not sure what they're looking for though. Will they see if I asked intelligent questions, or spent time answering other people's? I get the feeling this is just as likely to be a bad idea as it is a good idea. Does anyone have any experience or thoughts on this matter?
I thought about saying yes I use it, but I'd prefer not to reveal my username. However that might be more suspicious.
I put stackoverflow in brackets, because it could just as easily apply to another medium such as a forum.
(I'd make it community wiki but the checkbox is missing)