Even if most trolls have neon characters, this does not means all neon characters are trolls. So about the butwinging in face and stuff, its just matter of reporting and blocking.
Aditionally, i see no true reason of their colors hurting your eyes (unless you have a eye sickness or you screen brightness is too high or you are in the dark), your computer screen have lot of bright (and flashing) colors on many webpages and images you see daily.
After all i prefer to have realistic colors on my characters, but i have a few ones with neon colors and i believe it has nothing bad for anyone's eyes.
Edit: In most modern video cards you can adjust the colors in the screen so it wont hurt your eyes, ie: reducing saturation.