On a large screen, pages like "About us" and " Privacy policy" can be a little hard to read because the lines are too long
On the registration page, it would be nice if the "Terms & Conditions" was a popup dialog instead of a separate page that opens in another tab. This should be easy to achieve since you are using bootstrap.
Btw… i just noticed an error (usort() expects parameter 1 to be array, null given) when you try to access a topic that doesn’t exists. I think you should change the error notice or check your code to see what is happen!
I have the code in place for a comment option, wanted to do it in staged releases and feature requests to get people using the website and posting topics under ‘Deb8it Features’ - a little ploy!
I will remove the register page when logged in as suggested