I'm working for a company where the only rule why RAdmin can't be used is, that the controlled user is not able to disconnect a session if he likes to do so.
You can see that there is a connection, but you can't close this connection. The approach "stop radmin service" (user doesn't have right to do this) or "disconnect network connection" (bad idea, generally) doesn't help.
So, if you would add this feature, it may be used in the company also. They just have a few machines: About 23.000 ...
Thank you for finally RAdmin 3.x (and the client especially).