Their platnum service thing has an integration script.... I downloaded it. It doesn't work with the current version - but you wont' need it with this.
In my opinion you don't need higher than the profesional service plan.
Raidersoft is not IRC - so they can't impersonate easily. Jpilot is IRC so they can use an IRC client there and use whatever name they want.
With raidersoft if you disable the ability for them to change names (obviously) and disable the float button - you can lock it down.
(For some reason if you float - you can logout and login as a different name - because it's not a threads page.)
