This is just pure bullshit scare tactics. In order to successfully make a transaction, I have to have my watch facing me, double click the button, and then hold it near the terminal for a few seconds. There is no way someone could just swoop in and do a transaction without my knowledge. It's bullshit fearmongering like this that makes people scared of new features like NameDrop. Quit it.

In my experience with my Apple Watch you have to activate the wallet functionality in order to pay for something by clicking the side button twice, which should make it harder for somebody to just walk around with a terminal charging random people. Phones usually need to be unlocked to make payments too. In theory NFC credit cards could be scanned like this, and if you're worried about that you can look into NFC blocking wallets... I'm not super worried about it, though, because usually you wouldn't be on the hook for such a fraudulent charge.

Use credit cards and just report fraudulent charges