Is it time to start calling out bad cyclists?

Do you need to consider yourself a good cyclist to recognise bad cycling. Are there certain behaviours that are bad. Is it OK to notice and then call out these things? Is it better to call out people for calling people out, or call out people for bad cycling. Where is the back to my Xbox remote control?

You tell a stranger they are doing it wrong? How receptive are they? Read this thread and see the kind of response people get.

I suggest that there is perhaps a better way.