There have been several reports of 72h bans and I'll just link to a reddit modpost.

It's most likely just a false positive, yet it'd still be annoying to get banned for half a week over nothing.

Edit: https://en-forum.guildwars2.com/topic/140918-players-are-being-given-72-hours-bans-for-unlocking-waypoints-for-another-playeraccount-with-turtle/page/4/#comment-2042375