both retailheros and ninja players which are ressing things like Shard of onyxia as Shadow Priest and stacking other classes to the brim expect their owns. Both guildless for a reason. MC runs by them were also ninjad and chaotic from rumours.
Opened an Onyxia run today and baited a lot of people into their ID (myself included) making people locked while the raid disbanded because no one wanted to go with them as reserving shard is a big joke especially as spriest.
better to just blacklist them alltogether and save yourselves from them.