A quick question about X11 and securelevels

[Tom Norris]

I understand the things like not allowing the system clock to change and 
not allowing formatting of filesystems, but I want to know why you can't 
run x11 when you have a securelevel greater than or equal to one.  there 
is no _serious_ reason I wish to know, I'm just curious and google keeps 
feeding me tutorials on making my FreeBSD machine furiously hard to 
crack.  :)

Thanks,
Tom