Hey [b]fullclip[/b], there are plenty of legal ways to approach this problem, peace bonds, restraining orders, complaints, etc., but they are not always what you hope them to be!
And being in a small town, it has the added factor of being known by one and all.
It might be that your son will not find this solution satisfactory just because of the added attention it might bring to the situation.
Depending upon the age and size differences between your sons and these riff-raff, you may simply suggest to the boys that maybe they would likt to try on some boxing gloves and have at it, one on one.
But before you do that, use the gloves to spar with your son, to teach him the ins and outs of fist fights. You'll know when he's ready.
Or maybe you can get him interested in martial arts. Some boys are, some aren't.
If he is interested, or becomes interested, then great. If he's not interested, consider the boxing gloves.
The school has a great responsibility for any fighting that occurs on its grounds, or at its sponsored events. You run the same problem with brining it up at the school, as you do in getting the authorities involved - unwanted attention to the problem in a very small school. It could be that the end result is worse for you son than the present situation.
Talk to your son about it and get his input on the problem, asking him if he'd like to learn a little boxing, or see if he's interested in the martial arts.
Then ask him about the school, as well.
We all know that this is just a rite of passage of all young boys, and will pass in time.
That will be of no comfort to your son while he is going through the rite of passage!
Good luck! Keep us informed of what occurs next!
Eric The(Serious)Hun[>]:)]