When this happens, none of the loot grinders are happy because they can't get into the server full of proffers, and none of the proffers are happy because their gathering and crafting become at least 40% slower due to the severe server lag. It's such a waste that you would be doing throwers a favor by forcing them to switch servers.
A prof server would be defined as a server with prof XP up specifically. If someone wishes to grind materials with prof speed and ingredients with dloot at the same time, that's fine, although it is also inefficient. After a bomb ends there would be 30 seconds of grace in favor of the same bomb type to prevent abusing loot bombs to crash prof parties.