Again with the getting over myself... It's really growing tiresome.
By naming a retainer RMT you are essentially tossing up an RMT flag, it's really not much different than seeing a Lala train run by with no LS and all random names like Pqqqq Xxys. This naming thing is just a window to a bigger problem and should be cut short. At the very least I think forcing a rename of the retainer would make sense, coupled with a warning perhaps.
An outright ban might be a bit much, but I seriously hate RMT and everything they represent so it's a rather touchy subject.
