Is it time to start calling out bad cyclists?

I think its about time good cyclists call out that bad.. or even just a quiet word alongside them.. hey do you know your doing this.. its a bit dangerous.. although am sure with some of the muppets who have crossed my path, it'll fall on deaf ears.. really concerns me the level of people cycling with earphones.. hate being the old man tut-tutting in the group, but its just asking for trouble... =(

Can we start a list and hand out special spoke cards to all these good cyclists?

Do I add you?