Today's hate is stupid forums (not GZ!). I made a post on another forum last week. Today I got an email saying that it's been a week and I haven't marked any of the replies as an answer, so can I please do so? Except nobody actually bothered to reply to my post in the first place. How about actually checking the reply count before sending emails?
Of course, the really annoying thing is that this is the official support forum for a piece of software, where questions are regularly ignored if they reach more than about 5/100 on the complexity meter.
On that vein, "Official community support forums" from companies that only provide email-based support to paid customers. You post real problems, a bunch of people reply with ideas but you never see anyone from the company replying or solving a problem.
A bit like Google product support. And Microsoft. And a bunch of other places.