@Tony Thank you.

@Tony thank you for your reply. I have already MAC filtered. It is still showing in my network. It is a Panasonic TV, I have an Emerson hardwired to router. I do have a Visio tv, but it is not hooked...

I have recently discovered that there is some TVs and other equipment that is in my network. I would like to blacklist them/or prevent them from getting in my network. I have done the following: I...