but I find the HN bot valuable
el texto del contenido creado por otro usuario = robar
I actually edited out a similar idea to your second point, but the way, but I wasn't sure any of my ideas would make things appreciably more difficult for bots.
The concern that has been creeping up for me about pursuing the reputation angle, is turning Stacker News into a closed community, with a sort of caste system.
I've found a workaround, I will start to include one of their posts in the blocklist, so even if they change their name, we can always use the post to find their new name. I know it's a bit of a cat-and-mouse game, but i'm not letting them get away that easily.