The GM is not going to spend hours on one ticket. They roll in, see someone appearing to afk farm, send a tell asking if they are there. Then they check the zone logs and find what, I assume, appears to be evidence of this person sitting there with their merc doing the killing and assume what most of us would. I assume it took them about 3 minutes in this case. No response, evidence of afk farming, so suspension. On to the next help desk ticket.