XP

This should hopefully all be very obvious.

Don't meet up in large groups.

Don't throw beer bottles at the police.

Don't litter.

Don't be stupid.

How stupid do you have to be to attack the police in the era of technology? There are always going to be at least 10 smartphones recording whenever something intersting happens. In addition to that, not wearing a mask is beyond stupid. You've literally got the perfect excuse to wear one...

Although there's strength in numbers, that argument won't hold up when you're in the wrong and end up in court/jail. Don't just go with the flow.

If you can't control yourself when you get drunk, don't drink.