@mattwilcox
I don't think calls are a hostile form of communication. I actually prefer them with some people because I communicate better in speech than I do in writing. 90% of communication is non verbal, the tone, the intonation, pitch and context... all of that makes it easier to understand than the written word without all of those things.
What I hate... is the expectation that you must be available immediately to take some ones call.
As a result, I don't give out my mobile number unless 100% needed. I don't answer my phone unless the number is some one I actually know (even then, I might send it to voicemail if not in the mood).
I miss the days when some one would say, I'll call you at 7 on tuesday, and do so. Now they call you when it suits them and get miffed if you're not available.
The hostile calls are from companies who demand your mobile, then spam you with calls and demand that you call them back and sit on hold for 45 mins... they can fuck off.
Friends can call if arranged... everyone else can fuck off.