Earlier quoted context omitted.
"If you can allow websites to hide the mouse cursor" I object to this as well, but that's a battle that was lost a long time ago.
What do you mean, as well? That's the only bit you didn't ignore.. and it's useful for when you draw your own cursor in WebGL. I can't think of a single time I ever saw it abused, I guess I don't frequent the kind of website that would.
Yes, I do see the usefulness of being able to do all of those things, but in practice, I don't appreciate it when it's done. I'm not saying that it's abusive (and I'm not talking about egregious misuse of these abilities), I'm just saying that I personally dislike it when sites do this sort of thing.
I fear that I've come off as too militant on these issues -- as a web dev, you should do what you deem best. As a user, if your choices are too annoying to me, I'll just avoid your site.
I think this whole thing just plays into a personal issue I have over the web these days... from a usability and aesthetic standpoint, the web has been noticeably declining for me over the past few years.