Thank you all for your comments.

There was a question about why this should happen to me at all. This a million-dollar one for me. The mechanisms are several but a common one is I attract the attention of bullies. I remember a documentary about dangerous prisoners, where one of them said he would recognise a victim 'in a heartbeat'. They start politely (we come back to the out of prison context ) but gradually follow-up with an increasing number of suggestions I do something. I find most of them unworthwhile, and gradually their smile starts showing fangs, and other folks are all one-by-one made to turn against me.

I have a strong sense of individuality and, generally, like people, but what happens to me in groups is sometimes really scary, especially with the masks on the faces LOL, and with their wants and neediness people sometimes feel like zombies.