if your talking about the "incoming search" box above your "uploads" on the monitor tab than you have 2 very easy options:

1) if each box is taking up half your screen, look for the little check mark under "incoming search" and uncheck the box, you will no longer monitor incoming search feeds

personally i rarely leave it on, i only turn it on once in a while if i cant think of anything to search for, than shut it off to read part of the list, since you can click on another persons search to activate your own, other than that all it does is spam you, so just shut it off

2) your other option is to remove the window from view completely

in the center of the monitor page you will see a small thin line seperating the 2 boxes, on the left hand side you should see 2 small arrows, clicking the arrows will readjust which windows your viewing. the arrows will move to either the top of bottom when you click them and shut off one or the other box. with the arrows in the middle you are viewing both monitor screens.

the arrows also work on the search page in the same way to adjust the viewable size of either the search or download boxes
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beyond adjusting what you view there is little that can be done to directly stop child porn on this network. the simple reality is that 90% of the content on this system is not legal. including most music, movies, videos etc

if they began monitoring and restricting access to what can and cannot be used on this network they would need to stop all illegal activity not just filter out what is and is not tasteful

not that im trying to advocate child porn, but its no more legal than downloading copyrighted songs and other material