Karma
I went to the track last night, and was putting some paragon on my tires. Wouldn't you know, I dropped the dauber and it splashed all over me. On my shirt, over my pit, and of course right in my eyes.
It burned a bit, long enough for me to think to myself that Karma is a bitch. It stopped burning though after a couple seconds, though. No blurred vision. No rashes. Nothing abnormal.
I guess everyone reacts differently to things. And perhaps thats why some people want a bit more evidence that this stuff is harmful enough (it is harmful) to warrant a complete ban.