> Give them a call, you're not harassing them.
Before posting this idea online... Maybe, possibly, but personally I still think it's a bad idea.
After posting this on HN - no! If you think it's a good idea, so will other people reading this. (And others have before you) After the post reaches the front page - absolutely no - there's a bunch of socially awkward people already thinking about calling the author and they really should NOT DO THAT.
The author owes us absolutely nothing and if they want to disappear, that's their right. Calling them is demanding their time in a not trivial to ignore way. Just write an email that can be deleted async.