There are "Top Shelf" and "Bottom Shelf" huffables; but when in need any huff will do. Although I saw some buffers did have their favorites as to first and last choices. Degree of need, situation, ease of use, and availability were the deciding factors.
I never thought about other reasons for limiting access for spray paint. Thanks for expanding my reality base.
It's $ profit for big business VS $ cost of liability with the legal system as the medium of exchange that drives almost everything on the market. Lawyers and their supporting professions are the only real winners. The only losers are the consumers and its just not related to huffing and huffers. I blame all parties; when it comes to acquisition of $, power, and control I see no Red-Blue-Green differences only differences in methods.