I suppose that's a definite possibility. I'm not sure exactly how it could be disruptive, though. In our course, there have been no complaints about this, though we have users with a wide range of technology taking the course. That said, I should add that our sample size is too small to be statistically significant.
MUDs are traditionally text-based, intended to run only through telnet or terminals.
The solution was to create a new command set which could be integrated into the existing code, would have no impact on telnet or terminal users, but which would be interpreted by a graphical client. An elegant solution, one which left the text-based users with exactly the interface they had before, but allowed users with Windows clients to have a fuller experience.