If we had the money

If you had that kind of money, you could just build extensive ground-based fiber and radio networks that invalidate Starlink.

there's no legal repercussions to going up there and deorbiting the satellites right?

Lmao, what would ever make you think deliberately destroying communication infrastructure would be legal?

Maybe install a defense platform to shoot down any more from spacex, oneweb or whoever else tries putting them up.

If you're talking about shooting satellites out of orbit from the ground, you don't understand how orbital spaceflight works. If you're talking about putting weapons in space, that's a violation of the Outer Space Treaty.

Also, blowing up satellites just creates clusters of space junk we can't get rid of, so it's a non-starter.