Interesting how some people get the impression a displaced thresh hold is there to make the runway look pretty.
In my experience they are there mainly for obstacle clearance or to bring the runway in question into a set of dimensions that make it legal.
It's there for a reason so use if in accordance with that reason. I'm sure that if something went tits up on part of the runway before the displacment you would be liable for any damage, and it could cause everyone involved big hassle.
Just my threpence, by the way, this is not intended to get at anyone in particular.
Rusty.