Raids are essentially useless. Sure it hurts the faction kicking the people cause some won't return and the ones that do return won't have perks for 72 hours. But there is no real fight in a raid, soon as a raid happens one of the factions kicks everyone.
If they kick all the members to stop the raid I think its more damage then the raid could do and at no extra cost of E to the raiding faction. Members have 3 day cool down in a new faction or a sub if there is one. then 3 days IF they return to the main.
The extra ODs and addiction for upto 99 players, less items traveling and all the perks gone hurts the wallet of every member.
Its not about bullying though is it? Some cases yeah its used in that way but this case isnt just pure fact this guy kicked all his memebers to make it look like that which why implement a raid base strategy when its basically useless and does nothing if members can leave or be kicked to stop the raid?