It doesn't really matter though if he has a pending court fine and he chooses to spend his money on something else. If he fails to pay the fine, there are repercussions. But this simply isn't grounds for freezing someone's bank accounts.

It's not illegal to buy something while you have court fines due. It's stupid maybe, but not illegal.

Because in the US we have laws. Thankfully so or armchair lawyer loons like you would be running a muck. It doesn't really matter if he's a shitbag, but you can't just fuck with people because you don't like them.