It's happened to me a few times, the last I caught up to the guys at a traffic light but they refused to get out the truck so we could sort things out, the light changed and they drove off. I've basically quit riding on the road as it's becoming more and more dangerous, sticking mostly to gravel roads and trails. My town has a large bike community and they seem to think that they own the road and show very little consideration for vehicles and the often inability to safely pass large groups of cyclist. I've bought at least five bikes from local shops and spent thousands of dollars in the process so I'm not anti-bike, I'm just don't have much patience for self-righteous folks who show very little regard for others.