Of course not that's just BS, they just happen to be popular in the same circles. Correlation isn't causation and all that.

I'm talking about the possible burns from skin contact, dangerously low blood pressure when mixed with almost anything else, and the few reports of eye damage found in users of the isopropyl nitrate variant.
(Just going from what I've read, might very well be fear mongering for all I know, never used them)

Now I'm not saying they should be banned or anything, they can be a great tool if used correctly from what I've heard, but proper studies and regulations would go a long way towards making them safer. Not that it's gonna happen with the current administration, but that's my two cents on the matter for what it's worth.