#1 - Yeah, they are. Nothing short of full-out screaming can be heard--during a dinner shift Hokuto was trying to get the girl next door's attention (not like THAT, Subaru can relax XD) and it didn't work.

#2 - no idea.

#3 - I haven't seen posts locked for gore yet (IIRC, anyway), but considering Farfarello... he might make that a good idea, yes!