The prison officers I'm sure call these fires "drags" as it is almost garunteed that by the time they have got through the doors to the room, the person is dead (this of course generally being the intention of said convict). There is however a requirement that the person is rescued even if the prison officer is put in danger and they have to wear mini BA which inhibits their vision. This of course then lends to attack if the person is not dead.
So all in all, despite being a regular occurance, they don't have a happy outsome for anyone.
If though, you put a sprinkler system in, they'll set it off. If you have detection within the room, they'll set it off. Also if you have a sprinkler head with recessed head, they'll take the cover off and hang themselves from the sprinkler head. So, all in all, not a great place to be.