No idea, but I've done a little bit of looking, and they have a history of attacking pretty aggressively, at least against things that auto-post. Those are mostly tools for spammers, though, so who knows if they'd come after me.
I don't think you are bound by their TOS simply by indexing their site. Whether it makes business sense to test this legal theory is a wholly different question.
Dunno, I guess my servers are accessing theirs? There are other ways to get the data, but yeah, I don't really want to piss them off. Was much nicer when I thought they were OK with this kind of thing from Craig's quora comments.
