Then there’s a lot of the US that they’re not going to function properly in.

Do read the fine print on the page. Images will only last between 30 and 365 days on 0x0.st.

it’s not strictly illegal

You’re not gonna like this but the Computer Fraud and Abuse Act in the US is so ridiculously broad that damn near anything that you do to/in a network that the owner doesn’t permit could be illegal.