Is it time to start calling out bad cyclists?

I was on that charity ride - heard that people were cycling like idiots but didn't see it myself. The 100 mile route took us through some crazy roads. The traffic was insane today, far worse than rush hour as all the Sunday drivers were sat in the bus lane.

I saw pretty much every type of behaviour exhibited in this thread on a 45 minute ride around SW London today. My fault for not checking there was a massive charity ride, a 7000 competitor duathlon in RP as well as another duathlon in C. London. Carnage, chaotic and farcical are words that come to mind. Huge pelotons of riders, saddles about 6 inches too low, weaving and swerving randomly around the road. Roadies and triathletes giving it the 'I'm a serious cyclist' look while riding like utter tools. Combined with the huge numbers of drivers who decide sunday is a good day to get in the car and drive to a busy town centre. Despair.

I was on that ride. Just did the 52-miler. Wot a disaster. It was horrible chaos. Naively thought it would be closed roads but no. Think I clicked in and out of my pedals more than I spun them. And spent more time at red lights than riding. Many people rode with this bizarre notion that because they were on a charity ride and wearing a red t-shirt that said "beating blood cancer" they were immune from the regular rules of the road. So much ridiculous undertaking or nodders getting pissed off if a car indicating that it was turning left did not wait for them to undertake. WTF? Never again.