The only time I got an eTDS message was when an agent applied a SWU improperly (used one to waitlist both outgoing and incoming international sectors - that would have been a great!). I resolved it immediately - I can't imagine getting one for every trip and not trying to figure out what was going on.
If you show the right amount of contrition, maybe they'll let you keep your AA account with 0 miles and start fresh, but I doubt you'll ever get anything back.