GUI? Its like talking to a mainstreamer.
If you are a sponsor, then no enter page or at least not when an affiliate sends a click. If you make free sites then make an enter page, if you make link lists make an enter page.. if you depend on outclick productivity (ie a CJ site or a starting TGP) dont have a warning page, or at the very least dont get your traffic trades sent there.
I'm not sure what else to say on the subject.