it has been my experiece that you can,
a. convince the cop not to write 8)
b. tell it to the judge, he/she will generally let of.
c. go back to offending intersection, with video camera document the lack of turn cycle, plead not guilt, get let off.
d. send footage to local/state department of transportation and request readjustment, this if it's near your home and you use the interstection often.
an associate at the dot here in washington, just laffed when i mentioned the magnets, and said he wished he would have invented them. they don't work but, a good money maker for the inventor though.
personally i don't give it a moments thought. wait one cycle then go. i have and will use my social skills if caught.