I saw a lot of people who have asked a question, but after that they're not looking at the answers at all. If you visit their profile you see that they're active (seen: x minutes ago).
Today I answered 3 questions, the questions had around 3 answers each, but the OP did not comment on any of them. I don't know why they're asking a question and after that just ignore them.
I'm wondering if more people have seen this occurrence?