It may sound like a minor detail, but if you specifically select the colour, red (which obviously is not part of your colour scheme), it's almost assured that t

It may sound like a minor detail, but if you specifically select the colour, red (which obviously is not part of your colour scheme), it's almost assured that they won't touch it. And by putting the "advanced" button in your settings page instead of having its own tab(it should open in a new Window preferably), you're almost guaranteed to scare more than 99.99% of the users since you've indirectly hinted at the fact that "if you screw up on this page, we are not responsible, and we know you will almost screw up", without even saying a single word. Design and colour is a very powerful non-direct communication tool. Of course, along with the normal people, there are exceedingly stupid people for whom you need to have a warning text.