Between late 60s and late 70s, I only heard of one ared rubbery in Tehran, and belive me, I was a well-informed citizen. The Eastern provinces as well Lorestan in the West had troubls with armd rubbery, mostly related to the drug trafficing. Now having met you and Mehran some 10 years ago and taking your age into account, I can assume you would not remember anything about those days...
Regarding your second point, IRI is not a solid entity. It has ben rather a dynamic govenment, I guess more or less like any te government. It has had good and bad days, strong and weak moments of its own, at times more liberal and time more controlling, sometimes provided better security to the society and sometimes less...