I am USER, hear me roar!
Hi there, you want me, I know you do. You got something to sell or you want to be heard, or you want to share. In any case - you need me. To make matters worse, you don't know anything about me.
I could be old, young, boy, girl, man, woman, handicapped or fully abled. I can choose from a great variety of means to use the internet and technology to control it, and you don't stand much chance to know what I use.
If you're interested in the thought processes that your users go through, and why you may be (inadvertently) pissing them off, I strongly recommend that you have a read.