And FWIW, Advocacy & Safety, while ostensibly what you are talking about, does not seem to be perused by many who ride as you described in the OP -- in a large group. Most here realize and know that riding in large groups, especially those focused on performance rather than safety, is not the safest way to ride. Note posts by those saying as much.

If you really want to make an impact and talk with those who ride in such a way, check out the Road Bike subforum. Word of caution, if you post there, you may not find those who peruse that particular subforum as willing to engage in discussion as polite as you've found here...