You're only paranoid if it turns out that big brother isn't actually listening.

More often than not they probably aren't but it's generally safer to assume they are or least could be. Back in my corporate days if somebody asked me a question that I didn't want to answer I often replied with "this phone call may be subject to monitoring for the purpose of service quality observation". Hey, I busted more than a few reps because I was bored baby sitting new installs and killed a couple hours monitoring calls and running reports to document personal calls on company time.

I don't do it but I support the idea of randomly adding "May the peace, mercy, and blessings of Allah be upon you" to your emails just to keep them on their toes.