Yeah, I see this as a side effect whenever I drop a YT link into a private tab that I don't want even theoretically influencing what happens on my actual account.

Usually links like that come from here. It's quite eye-opening, like turning on showdead in your profile and just rolling around in the [flagged] [dead] "politics" for awhile.

But you will want to take a shower after, and you should; when Nietzsche said it looks back, this is what he meant, and it will ruin you if you let it. We all eventually become what we pay enough attention to, and we always pay a great deal of attention to what we hate. That's why it's worth so much money to get us doing it.

(I know I'm not saying anything new to you the extremely veteran commenter to whom I reply, of course. But as of course you also know, there are always young 'uns here who hadn't seen it said so plainly yet.)