I’m pretty sure µTorrent Web is a browser plugin, not a thick client of yore.
This certainly seems to confirm my suspicion:
Since BitTorrent Inc owns µTorrent, and since the data resides in AppData, I wouldn’t be surprised if this is true for BitTorrent.exe either…
Your best bet is blocking those applications at the OS level, since there is literally nothing to “uninstall” other than deleting the executable.
Alternatively, you’ll have to figure out how to blacklist certain plugins across the various browsers used in your environment.