That is so stupid! This could be even more retarded than BT's. That is my opinion, I think knot knives are stupid too for hash. Smoking hashish in a pipe or rolled with tobacco/weed is in my opinion the best method to smoke it.
Going through all that effort does nothing, and most definatley not like in those pictures! What would end up happening is the hash wouldn't ever catch fire to smoke enough the way that you want it to. On top of that as the hash burns it becomes very soft; soft enough that it falls apart from the pin or whatever your using. Also worth mentioning that this would be with very, very good quality hash like Afghani Gold for example.
It reminds me of stupid kids doing BT's (bottle tokes) in high school staying all day smoking hash bits on top of cigarettes. I would be in the 'smoking spot' just for 10-20min, however long it took to burn a few pipes or joints, but they'd still be at it. Its retarded, I assume hot knives are the same way, as I still remebered when I started smoking this 17yr old while at his house while smoking weed the 2 of them started planning for the next hour or two to listen to Ice Cube and hot kniving the weed. I don't remeber much as I didn't speak much english at that time but it was stupid as well and these guys were acting like they were getting them so much more higher from hot knifes too (when I had puffed that weed from a joint with them and it was much stonger in a joint), the hot knives were very limited with smoke and didn't give off that much smoke as where in a pipe/joint you can get much more smoke at once. Stupid........