There are some people who use them. Some are fine, but others have had eye damage, corneal scratches, inflammation, pain, discomfort, and one girl started getting headaches whenever she wore one.
Personally, I think is it worth risking your sight for a certain look? Definitely not, especially when it's quite easy to purchase eye safe reds. Ben Nye makes a couple, Bloody Mary Rebel makes a red that's supposed to be quite good, and even Anna Sui has one. There's also a large market of bright pinks and oranges. I also equate the use of non-eyesafe pigments on the eyes the same as using a sharpie - you just don't do it!
I hope this helps you decide whether or not to wear them.