My normal commute is out from town but sometimes, like yesterday, I ride towards town with all the other cycle commuters.
If you think other riders are riding badly, you should go and talk to them, I reckon.
I hollered at 6 riders yesterday who'd run red lights. I also made a point of catching up with, patting on the back and chatting to two guys.
It's always going to be difficult because nobody likes being preached to / told they're wrong but I think you have to have a go.
Be super friendly about it but say something. Shout something if you have to, even if it's only "red light!" Best to avoid "red light *!#*" as that's not very constructive.
Anyone agree? There is a dearth of comments to these threads. Leggy, any do-gooding on your commute?