Running Mommy,

We battle the same thing in my local cycling community. We have nightly "training" rides that sound very much like the ride you're complaining about except that it happens 5 times a week. I certainly don't think there's anything wrong with you speaking to the group as a "concerned cyclist," but from my experience, it won't change behavior. Our local group has dealt with the police any number of times, got run down by an angry motorist/homeowner (she ran her car into the group) and had a fatality last year (there was wheel contact in the middle of the pack and a massive pileup) and NONE of that has changed behavior. There might be a short "cooling off" period, but they ultimately revert back to their old ways. I'm sure there are individual cyclists have chosen to forego the ride because of all or some of this, but the group itself remains just as reckless. I'm not sure what it's going to take for them to change.

So, with that in mind, if you feel like you have more to lose than you have to gain, then I'd keep quiet or have the police intervene anonymously.

Good luck!