This is like the third definition I've heard and I think it really highlights how ambiguous it is to define a word based on a comic as opposed to an actual definition. Some people think it's about civility like you said, other people think it's about bad faith requests for a source like Ulysses said, and still other people think it's about following someone around to other threads and refusing to disengage like someone else said. This is why I say I have no idea what it means, despite having seen the comic and seeing the word used in various contexts. I hate it.