Currently: Not for a user.
The only way to block at instance level is defederation which is usually a bit extreme.
This shouldn't be too complicated to handle at the user level, but someone would have to spend time to develop it and contribute to lemmy source code.
Likewise, there are specific instances for which I'd want to auto-sub to all current and future communities, which is also not a fair that exists (other than creating your account there and browsing "Local")
IMHO, Blocking at the user level is a feature that's relatively likely to happen eventually.
Honestly, a PC monitor and a separate device connected to it is probably much less bullshit.
Pihole is nice to have regardless of TVs.
Commercial displays are usually very overpriced, although if you can get a good deal that could be nice.
Not sure I'd "trust" any such menu.