Virginian, I've never seen anyone use a red-dot or holographic optic to shoot em either but I've heard of people doing it.
I just have a feeling that when everyone's using O/Us and 30"+ barrels that people who come to shoot don't want to be laughed at so they get a 30"+ O/U as well. (or a long pump/SA)
Personally I have more confidence in my 18" Poly-choked Russian, Stamped - sheet metal, black on black with a drunken Russian paint job, when it comes to hitting what I'm aiming at, than I do with my inexpensive, but normal looking O/U.
The best part of shooting trap with a Saiga-12 is when people give me weird looks when I pull it out.
Don't get me wrong, beads work just fine, but for someone who started shooting on rifles, you learn to look THROUGH the rifle sights like you'd look through a rib/bead setup.
Although it is a bit of a pain to have to single-load a semi auto that has no LRBHO (the manual BHO works but you still have to set it yourself) I do alright... I'm waiting for them to let me load up a 10rd mag and shoot each of the 5 stand stages without having to reload