It's one thing to block ads when they have been loaded into your web browser that is in your room (completely morally and ethically fine). It's a completely different thing to go into someone elses space and start making decisions about what is or isn't running on a tv there.
I like ads as little as you so what I can do is just boycott that restaurant or bar entirely or ask the staff to turn it off. I think it's part of being a well adjusted adult to know what you want or don't want and go about it in a reasonable way (such as asking staff). It's immature though to just do that forcibly.
It is however not my duty to teach you that, so let's leave it at that.