>>77244There is because then he'd be able to spam in a 5-thread-max containment board which no one cares about while being banned from the other boards. There are multiplayer games, I think CSGO and Dota2, where griefers, trolls or suspected cheaters due to low reputation points or something get put in servers to be matched up so they only play against each other. This would be a similar principle.
Also I think it's good to have a testing/scrap board anyway for users to be able to test out uploads, emojis or w/e to not bother anyone else with their "spam" on /lounge/, or for debugging purposes.