eeper23
Not sure what they can do about dicky encoders, I have not been busted like that, however I had a faulty one once, it randomly spat out an altitude many thousands higher at times, was asked to MODE A it and they manually followed my ALT by checking with me. No problem but I can imagine they can not handle too many of those at once. I did fix it quick smart!
I do know of others..... but if you do not listen on the right freq you may never know!
J