I have to ask... did this suggestion come about because you had a negative experience while on a Blue Dragons task?
As far as I'm aware, it is single way already. The player can only be in physical combat with 1 mob at a time and only 1 mob can be attacking the player at a time.
The only mob worth camping in Kuradals is Blue Dragons, so disallowing the use of a cannon would be overkill in my opinion.