I think standing up to them and confronting them about their behaviour is the best thing. It's also probably the hardest thing to do.
Absolutely. If there are no consequences for bad behaviour, the pattern will just continue.
If there are many people involved then discuss it with them and make sure you stick together and don't allow them to single people out for attack.
Agreed. Bullies always single out individuals, usually they pick on people who they think won't fight back.
Don't allow them to get away with a quick "sorry". Say "Well I'm sorry, but 'sorry' isn't good enough. You need to stop treating people this way!"
Too true. Saying sorry means remorse for what has happened and a commitment not to hurt again are essential. Words come cheap and mean nothing without action.
Englishman.