I spoke with my friend out at KDFWR today about this topic. He suggested, as has already been said here and a few other topics, that if you are witness to any violation to call and report it. You can always call:
1-800-25-Alert. This goes directly to their dispatch. Make sure to get boat number and such of the violator. If you don't have any pertinent info then it won't be of much help. Keep binoculars in your boat so you can read their number from a distance. Take a picture with your cell phone or digital camera for further proof if need be. Be proactive instead of just complaining about it. I had to call them last year when fishing out at Guist Creek. People were skiing outside of the ski zone. They were coming back into Tick Creek. The folks at the marina did not seem to give a hoot about the violations which were occuring almost under their noses. I don't know if a CO came out or not. I was fishing and moving around to different places.