Very common one I did would be something I wanted to avoid spoilers for. So example would be blocking "House of the Dragon" and "Fire and Blood" so I didn't accidentally see any spoilers from random posts whether it be from before the episode aired, or from book readers who had read everything.

Particularly useful for anime where most stuff is based off the manga, which manga readers are sometimes really eager to give hints at. Like "oh don't be attached this character hehehe". "Oh you're in for a twist soon."

And of course game, I'm not going often getting games when everyone is talking about them the most. So I prefer to block out stuff so things can remain fresh when I get around to it.