While I understand that you need to disable certain PHP functions due to abusive spam sites and phishing sites but disabling the fopen/fclose functions?
When I first signed up for the service, I was fine that there was no MySQL support, I went to get news management scripts based on flat file systems and it worked fine. It made updating the site easier and that was probably the most important part about it. You may think that since MySQL functions are not enabled, what about using database driven scripts. Even if it's efficient, what happens if the server is down? That's why flat file systems work.
Here is another scenario I think that you might want to rethink about your decision. RSS is not new but it does help people to return back to your website and notify them of new content or updates. However, generating an RSS output via PHP headers to mimic an XML RSS feed on this server does have its caveats. The ads are messing up the system. I found a workaround this problem by creating a PHP script that writes an XML RSS file and it works and it also requires the usage of the fopen and fclose functions. Think of it this way. You have ads that you want to serve to visitors. Without this, you might lose more of that.
Just as
wtf said in this
post, not many of us would want to pay for hosting or for added functionality. If you want to disable these functions, why not have some sort of condition like posting 10 posts monthly on this forum to get this sort of functionality. This way, you know who is using the functions and monitor them.
This is just my two cents on the issue.
If you are not going to change it, I suggest you list down which PHP functions are not allowed since phpinfo() is also disabled. This way, anybody who wish to install any PHP application can choose the right ones that fits with the system.
Second, is there a problem with the session_start function? It seems that you get a permission denied error and it's not only me. I did a search within the t35.me domain on Google and found a number of sites also having the same issue (
http://www.google.com/search?q=site%3At35.me+session-start&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a)