This is not new- it was also in the old Guide to Safe Scouting. I, too, was going to show/teach our scouts to make/use alky stoves, until I found out that it is against scout policy. I was actually told be another HF member, because I was unaware, and new to the alky stoves myself.
To the OP: It's up to you. Amsteel is not cheap. You could always try mason line, if they can master that, then they can do amsteel next. I actually think the mason line was easier to make the locked brummel and whoopies with.