I was in a hide today with my wife at Alkborough on the confluence of the Ouse and the Trent. Also present were two retired gents who had turned away from the open flaps of the hide and were ignoring the birds present . They proceeded to bitch about other birders for the twenty mins we could stand being there. Both would appear to have been twitchers, as apposed to birders and did not have a good word to say about others that they met on recent trips. Is it good manners to leave or challenge them on their unsociable behaviour?
Only way to avoid these sort of boreburgers? Avoid hides,twitches and find your own birdwatching hotspots.
I've got my own long list of such places locally-but I'm keeping them to myself!