Two potential problems with using existing individual accounts:

1) ToS violation and ban.
2) Security and compromised account information. I don't mean Keyclone ripping our accounts, but someone getting inside the thing with the information we discuss openly here. WTS 4x gladiator shammy group, $$$$!

I think a load of trial accounts registered with a load of different IPs and then used on a load of different PCs via keyclone would work and not be against the ToS. Preparing a list of account names and passwords and assigning them to the community members who are happy to have their client installation and net infrastructure used for this is also trivial.

As far as responding to a GM query goes, you would have to have the people who provide the PCs monitor them and be in Voice chat with 'the controller', just to be able to do something about it.