Just those who think how Mike has outlined, and which (sadly) is undeniably true. Quite simply, if someone shows disdain towards me, I'll gladly return the compliment tenfold!
It's an Italian thing... Think Mafia films;)
Marco.
P.S The same applies the other way... Show me kindness and respect, and not only will your get it back tenfold, but you'll never have a better friend! *However*, if you fuck with me, I can make a terrible enemy, as I'm a vengeful bassa...