Is anykind cooling off time a middle road solution — and now I revealed I haven’t read docs how self deleting actually works. Self deleting helps admin’s work a bit, but rage attack and hurt feelings is not good base to do some drastic either.
This is part of more philosofic question: how much we/them/everyone must protect an user against them own actions. Corporate level support forum may think it is a good policy, if they really cares what a single customer do — this is not part of B2B world, though.