I tried this, receiving a room from a supporter interested in the Academy build with a test script (my goal: to add noises, which I used to great effect on a SpinDizzy build of the Creatures world).
The script worked. However, it is not possible to list or remove scripts as the room owner; only supporters have the command bundle. (Of course, I imagine a builder could do this too.)
You also don’t know exactly what the script does, whereas by comparison on a MUCK the code is available (if you can read MUF or MPI); it’s just access to submit such code to a shared (realm) repository is restricted - usually on a technical capability and trust basis.
Incidentally, this wouldn’t need full listen capabilities, just knowing that a character spoke, which would be a more palatable variant of listen if we don’t know the code. (You can do it without even that but then it just spews noises without activity which is usually not desired.)