Is it possible to blacklist transactions?

I got scamed:
That is the money from me:

Is it possible to block something like this?

Not at the protocol level… There are a number of wallets that do better or worse jobs of protecting you from scams.

I use Rabby. It has a list of known sites, and makes you sign off on lots of warnings if you’re going somewhere that isn’t known. It’s a browser extension by debank, you can find it in the chrome store.

Thanks for the answer!