>An AI cancelling other people's gym classes is a felony? Don't computer systems fail all the time at holding reservations for people?

the difference is intent.

if a concierge/booking system makes a mistake (or has an unintended bug or whatever), no crime.

but if i (or an agent working on behalf of me) use an API in an obviously unintended way to revoke other people's reservations, that would fall under the computer fraud and abuse act (in the usa).