[QUOTE=Phishermans Phriend;225045]Great, fellow, indeed. Congratulations on this post, I guess both dutchman and macbeth will know how to, after this fantastic explanation.
@dutchman & macbeth:
I could make some clips for you, but all I can do are rightangles, so this will not be very elegant. I made some screens how it could possibly look like. Tell me what you think and if I should remove/create some more clips. (Clips are the purple thing, and I’m counting the seconds until somebody will post “This is not a clip-texture”):
Those three clips should block all TJs over the Wall up to a djheight of 1.5. Some trickjumpers will always find a way, but I think this will stop most of them. But I personally wouldnt run such a script on my server, because it gives the Axis a big disadvantage in movement space.[/QUOTE]
'Tis easy to do with a little bit of research. Of all people you should know that giving a man a fish feeds him for a day, but teaching him to fish feeds him for a lifetime. 
In any case, why not simply block the entrances to caves/passages behind the wall with some sort of team specific barrier, ala fueldump and many other modded scripts…