I do understand your desire to be alone Tideliner, and to shun the crowds. The thing is 99% of the time you would be alone and enjoying your hobby in the way you choose, anyway. You might get 1 or 2 great finds in your lifetime where lots of others come to see a bird. Within a few days the crowds will be gone and you'll be on your own again. Is it not worth sacrificing a couple of days to share your sighting with the masses? You could even spend those days a couple of miles along the coast if the crowds bother you that much (though I say revel in the glory, it's a great feeling to make others happy).
You have witnessed some poor behaviour which has put you off spreading news. And yes there are some idiots around, no question about that. But they are in the minority and could equally be simply branded 'birders', a group that encompasses us all, including you! Those flushing tired migrants might well be 'rarity hunters' who don't twitch at all. Labelling a group of people with the traits of a minority is after all by definition, prejudice. Others are beginners even and haven''t learnt the 'error' of their ways. The 'good' a twitch brings nearly always outweighs the 'bad' and the 'bad' is usually kept in check by other birders present anyway.
Try not to stereotype the 'twitcher' as a tick-obsessed invader who cares nothing for birds. Most birders care deeply about birds and the environment and many of them are twitchers. The problem is you probably don't know any of these twitchers personally. I twitch myself but I spend most of my time patch working and watching common birds. And if you've travelled any distance to see a particular bird (even just a hundred yards!) you have been a twitcher yourself. Remember we wouldn't know a tenth of what we now know about birds if the knowledge wasn't shared with others.
Suppression has turned parts of the country into an unpleasant place to be interested in birds where bad feeling runs high and politics rule what should be a wonderful hobby for us all. I love birding in Norfolk and cringe at some of what I hear happens in the east of the county. Share your good fortune and spread the news! B
James