Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello

3 people from my family are playing WoW and player named Camooflage wasted over an hour camping us and accusing for multiboxing

You can monitor the logins there are no 2 accounts at the same time from 1 local/private IP adress
and the characters are doing activity that cannot be done by single person at the same time

We don't want to get our accounts banned because of somebody who is incompetent of judging the situation, so I ask you

Stogen & Dumkin

It's likely the player was just trolling you.

If you're not multiboxing, you have nothing to worry about. Each case is judged individually and they don't ban just because someone says they thought someone was multiboxing. And even then, according to the Terms of Use, an offense for multiboxing will net you a warning at first. Only if you persist in multiboxing after being warned will they ban one of the three characters.