When I logged in earlier I had 159 alert but when I clicked to check them, I had zero alert whatsoever. (Not even the ones I've gotten in the past...)
Yep, many had that just now, and I believe the sheer number of alerts from the spam crashed it, cuz its normal for non participants
must be because someone deleted all the posts. it has happened to me before and happened to me now too. must be that boba is a tsun post
Look on the bright side. You deleted them yourself, if someone had reported it I would have banned them instead. Consider yourself his savior.