My mom wouldn't give back the computer this morning until I wrote "I will not be drunk and belligerent" 100 times on paper.
Cat batches have an AA of 1 hour so unless they start looking at them right away, they go to AA. I have heard of people getting hard blocks from cat batches though.
https://www.reddit.com/r/mturk/comments/4upcor/i_heard_from_a_requester_that_they_cant_reject_a/ Seen it there, asked around and the consensus seems to be that they can't reject if they use that template. Blocking is still an option though.
I assume it's just a misunderstanding since, as Slippery Pickle said, the AA is so short if they use the default setting of 1 hr.