Was an emerging problem less than a decade ago.
https://www.poison.org/articles/2013-sep/inhaling-alcohol-is-dangerous
Had graduated from people “whuffing” spay solvent in the wal-mart, if i recall correctly. Inhaling ethanol, well there could be a flammability factor if some fool is around on exhaling.... near a cig lighter or other flame source.
Fuel/air.... etc.