Below are some of the biggest reasons you should sign up:
It's Easy - Either signup with your facebook account or fill in a few fields and enter
in the captcha answer for a regular registration. It takes 30 seconds and you are logged in immmediately.
Comments and Forums - Another big reason is for comments and forums. Comments are useful
for a site like this because users can point out issues/suggestions with submitted code/tutorials/etc.
and forums can be the same way, even better with users asking others for help.
In the end, the number one priority of Insane Visions is providing a site with a lot of useful content for web
developers and a community where people help each other. If you're interested in that, sign up!