And each one (if serving a significant client base sufficiently threatening to the regime) is a perfect target for anti-radiation weapons. Even if not worth a missile, it would draw attention from military ground operations real quickly.
Depends upon how many targets they have. Yes, you are right rf signals are a target.
Low power, directive antennas and line of sight path makes it harder to target.
Even cell phones when working can be used to identify people.
I remember when I first started using Twitter in 2009, only thing coming out of Iran was Twitter. Young people with smart phones looked like they might get enough news outside to topple the regime. Ultimately it failed, they hired foreign techs and circumvented efforts to hide the GPS and arrested over a thousand young people. Many were never heard from again.
I can still show you the no loner active screen names in my timeline. some were in Iran others not.