That horrible headachey disoriented feeling you get when workign too closely with duster... you mean to say people do that to themselves ON PURPOSE!?
(i have, out of curiosity, inhaled a small amount of duster to confirm that it's that same nasty feeling). Very nasty feeling, it feels unhealthy, and i'm quite certain it is. Solvent abuse in general is a Bad Thing. High risk, shitty high, lasting sideffects. Unlike good drugs, which mainly effect a small selection of specific receptors, solvents (including duster) are not very selective, and make a mess everywhere.
Oh, and i've never seen 1,1,1-trifluroethane. 1,1,1,2-tetrafluroethane is pretty common - though it looks like the trifluroethane would be best as a duster, as it's got a lower boiling point (and hence probably higher vapor pressure, so you can get a stronger blast of gas out of it). I'd rather like some 1,1,1-trifluroethane duster, as the 1,1,1,2-tetrafluroethane ones get weak too quickly when they're not totally full (due to the contents being chilled through evaporative cooling -> lower vapor pressure). Once they're under half full, i can't get through a thorough laptop cleaning w/out a pause while the can warms back up. Yes, my laptop requires frequent dusting. My appartment is dusty, and it's an acer laptop so it overheats if it gets clogged up even a little.