Just beware last I checked they’re not very active compared to the reddit. Getting into a lot of trackers on open signups tends to rely on someone posting about it within hours of it happening. Unfortunately less people use lemmy so they’re less likely to post about it here, it’s not like they have some person in all the trackers who keeps an eye out, it’s entirely up to someone noticing and making a post. Some may open for only 24 hours (hawke tends to I think).
So regardless of where you see something open, if you have a place you want, I recommend signing up immediately within minutes rather than waiting even an hour as you never know how long it’s been open before it was posted about or how soon it will close. Just make sure you read the rules and any newsposts for new users within the first 24 hours if you can as some places may require activity in the first 24-48 hours for new accounts.
If you block ALL traffic from it? Sure. It’s possible but more involved and requires the right hardware to block their tracking domains while leaving streaming apps working.
It’s best not to use smart TVs as well smart TVs. The apps they have are almost always slower or inferior in some way to the versions you get on streaming devices, updated less often, etc. I recommend pairing a TV with a quality streaming device like an Nvidia shield (or shield pro) or an AppleTV*. Alternatively if you want something a little cheaper in Androidtv space there is the Walmart brand Onn 4k pro.
*warning with Apple is while they’re pretty good on privacy (meh, there are no excellent choices that support streaming apps in 1080p quality) and don’t have ads their app-store is a bit more locked down. They have all the major streaming services but if you do high seas type stuff it will be more involved and difficult. Though if you have a local media collection (source your own discs or high seas) and run Plex or Jellyfin they have apps for both of those that work great as well as Infuse which usually requires a subscription unless you don’t need 4k or any proprietary audio codecs like dolby for any of your media. I personally can say I enjoy my AppleTV 4K and I think it’s a great device but I run my own media-server and have some common streaming services I pay for.