Had no idea there was a "permanent record" of sorts, makes sense though - also lols at abusing a mod, because that'll end up working out for you!!!
We generally have a good idea at who is going to flip their **** and when it comes its not a real shock, to me atleast.
There are some that go to far, the other week I was ready to throttle Big Al and then he started PMing me with threats telling me he was some sort of martial arts expert. Honestly, im surprised hes lasted the two weeks following that.
As far as permanent records go, all infractions are against your account, they are never removed. Points might expire over time, but they still exist, so we can see what youve been like in the past (Hell, Ive still go two infractions from when I was a regular user).
There is also a duplicate user checker so if you create a new account, it tells us. Theres a reason why when someone asks us to delete their account (usually following them having a sook over an infraction) we dont.