Stupid things people say to you at gigs.

[sleah]

Maybe so but I wouldn't go around making a claim that it is harmless to someone if I couldn't prove it.

Actually, you can

All smoke fluid is, is glycerine & water. It will not set off an asthma attack, or affect an unborn baby.

About all it will do is (after prolonged use) give you dry eyes & / or a dry throat as glycols tend to remove moisture from surrounding areas.

Steve's absolutely right. You can download a COSHH sheet from LeMaitre that actually proves that it is safe, it's fair to assume that it's the same for all manufacturers, unless it's some dodgy import that's not passed any safety tests/kite marks or equivalent.