jetpack+no-clipping

[Mix_Master2k]

ok this is kind of fusterating me.,

in my map, ive made a secret area for the clan leaders accessible only through a certain trigger that is well hidden within the map. But,, we are using omnimod, and people can use the model scaling, and jetpack trick to go right through the walls. Is thee anyway to stop this? Clip brushes dont do the trick, either do regulr brushes, and i don't want to have to make the brushes 100000000 units thick. Any ideas? Thanks in advance

-Mix Master