I love watching these guys, but they do it in the middle of the night and we know to expect them. I was just out cheering them on a bit ago:

[link to en.wikipedia.org]

Your bikers should follow the correct traffic laws for bikes in your state. Are the police aware of this problem? Education can help, signs...have a public meeting at the library, those can very fun. Get a bike education group involved. Pass out literature, get the local newspaper involved:

[link to www.bikeleague.org]