I find it offensive too, I'm just too lazy to change it.
However, if a person with epilepsy were to look at my icon, I'm pretty sure the fact that it's 50x50 pixels and doesn't have many colors that strain the eyes (and that it isn't blinking as fast as it could be), that they wouldn't go into a seizure.
Unless, of course, someone (or you) has. If that's the case I will immediately find a more suitable replacement.