that's stupid. they might as well stop anyone from creating fire and smoke anywhere in the world then because ALL smoke is carcinogenic.
Then again, the fact that altarboys carry those censers which waft large quantities of smoke upwards, where they inhale a lot of it, should ring some alarm bells.
I would think that'd be the least of the altarboys' worries.
Sounds pretty dubious, but then, anything to get rid of incense...