I think it is a very necessary button feature to have Like the ones all smart phones have I don’t know if it is difficult to implement Such feature though
I mention this because you will always have intruders who don’t respect other people space and that block button could serve as a temporary peace
@yoslounge do you mean as ... moderation (in comments and chat) ? A direct contact to @Dr_J is always possible for that purpose (or am i wrong?). Many times fake accounts / intruders were banned and blocked like this. But maybe you see it as just one member could block another (and only for this member) ?