There's safety in numbers, until those numbers start running into each other. In the last three years the number of falls I've been involved in are equal between riding solo and with a group. I do have more solo miles though.

Group riding is more fun as you get to interact with others. It's usually faster also as people tend to motivate each other. And if you have an accident, there's usually someone that can help right there.

I wouldn't give up group riding for the occasional accident. What I have given up is riding with certain individuals and groups that were too dangerous for my liking. I've gone so far as to drop off the back and tell people that I'll catch up later.