Maybe not.
I think there's some pride in your country involved. I'm rooting for the US and, despite my lack of interest in soccer, I've watched both games. So I'd say I care but, once the USA is eliminated, soccer will disappear from my radar.
Something about not getting the thrill he expected by blocking you.
They may.
I think they're saying "Buy something!"
Yes. If you don't want to read posts by a particular user, it seems you wouldn't open a thread entitled "Ask the user you don't want to read Thread."