This question is related to
but touches a different subject. I am asking you about your opinion on users who regularly post questions but never comment on them and never accept any answers for their question. I think that users of this type are actually harmful to the site, much more so than users that are simple hit and run incidents. What is your way of dealing with them?
Personaly, especially with low-rep users, I always check the users answer acceptance history before answering their questions, and I simply ignore users who are obviously not going to put any effort into either commenting on or accepting other answers. Do you have any other tactics against this kind of behaviour?