Is it time to start calling out bad cyclists?

please stop undertaking into tiny gaps. Thanks

I reckon it's an epidemic. Had two people try to undertake at E&C North, almost squeezing me into the next lane. The sun's out, that's all.

All this undertaking is because we forummers ride so assertively and leave a real tempting gap between ourselves and the kerb for the kerb crawlers to sneak past on the left. I suppose all we can do is keep setting a good example and to glance over our left shoulder now and then to see if we can catch them