Few questions

[yojoe]

1. if this theme uses jquery, you can easily find a snippet which disables clicking on a link with class.
You can find demo of such one here: http://jsbin.com/akihik/3/edit

I'm not familiar with any other, easy way to do that, not involving content filtering through a plugin.

2. creating custom error page is described in wiki.
Its the easiest page to create in whole GS