Blatant use/positioning of head. You don't have to dig your head into your opponent's face when your'e both clinched and he's already in a compromised ring position (i.e. back against the ropes)
"Subtle" rabbit punching. When you know your opponent is going to weave under your hook so you purposely add extra arc and less range so the punch lands on the back of his head but looks accidental.
Holding an arm out to cover your opponents vision, Technically illegal but it never gets called.
Holding your opponent's head down with forearms after missing a hook. Putting opponent in headlock after missing a jab. Both are technically illegal but rarely get called.
Let's not forget the elbows thrown in the Bika fight (i also specifaclly remember one in the Froch fight). Although I'll let the Bika fight slide because Bika played dirty himself.
Hopkins used to piss me off with his thigh and butt punches and especially his right cross-"accidental" headbutt combo.I'm not condoning Hopkins' use of "accidental" fouls but Ward is not some 46 year old man in need of a handicapp. Ward is in his physical prime and the handicapp in this fight was already built in with Dawson's weight loss and Ward's homecourt advantage.
Ward is a great fighter. So good in fact that he doesn't need to fight dirty, and that's what pisses me off. Being super-religious and still commiting multiple "accidental" fouls only makes it worse.