Who I block on Twitter:
I will debate almost anyone.
I love ideas.
I will not debate (and will block) people who:
(a) target my job,
(b) target my appearance, or:
(c) libel me.
Also, since 2016, abusive reporting has become a thing.
I was targeted with abusive reporting by
an Israel-hater pretending to be "Jewish".
So I now also block:
(d) any account that even hints that it reports its enemies,
(e) any Israel-hater that claims to be Jewish.
It is just self-defence.