There were a ton of Boston University cyclists today as I was passing through right before 10am, and the lack of etiquette or even awareness is astounding.
Many people right on my wheel as I'd slow down for impassable red lights, squeezing by to the left or right only to stop in or right after a crosswalk. I'd then take the lane and drop the pack, only to inevitably come across another group all over each other in the bike lane. Again, take one of the two car lanes, often the left, cause double parked cars & trucks by BU all the time, drop the pack, come across another.
This morning, the front runner of a group (wire basket, pedaling standing up with a kinda violent motion) was trying to weave from the bike lane around a double parked semi without really checking the two lanes of vehicle traffic. A car was getting over from the left to the right as they and the front runner both passed the double parked truck (occupying space from curb to nearly the middle line between the two car lanes) so front runner hits the passenger side door and gets all angry and the pack sorta ground to a halt as I cruised by far left.
I do not trust any of the 'cyclists' out there.
If someone sits on my wheel for a minute I'm inclined to either drop them or drop behind them, depending on my mood.