No-Restraint Letters

I want to say so many things to so many people, yet I always do it as nicely and simpathetically as I can, and sometimes there is simply no way of saying it without being harsh. This can honestly get frustrating sometimes with some people.
So, the purpose of this, is to dump all of the angry and even hateful things I want to say to people, so I don't eventually crack and say it to them directly. I do this on my own sometimes after someone frustates me a lot, and some of those may go here.
I would apologize for being an asshole in this, but I won't. That's the purpose of these letters. I will warn you about swearing though, that's a must.
So, after coming up with nicknames that will not reveal the person's identity (I hope), let's begin.