First things first, what type of ******* are they?
If it's a cane?
Your best bet is to file half way through it,
so when they're walking,
it snaps, and gravity takes it's course.
wheel chairs are more fun.
more expensive as well,
so take some water-
and squirt it into the wheels bearings.
watch them rust,
and beat them in a foot race.
annoying visual disabled people is a bit easier
partially due to the fact that sight isn't their strong suit.
but their hearing is much better.
so be sneaky.  
and put saran wrap face level through a door.
(make sure the ground is carpet or pillowed)
the brain damaged few?
have a bit more variety too them,
and with variety comes creativity.
so get creative and when they mention a color of something,
tell them that that's not what color the thing is.
"look at that cool blue car"
"what're you talking about? that's red??"
you'll never see anyone call a neurologist so quickly.
colorblind or dyslexic is real easy.
look up synonyms for short words and replace them with the longest ones you can find.
text them using this absurd paragraph.
watch the ******* emojis fly.
and colorblind is simply talking to them in type.
in random colors, printing it off, and handing it to them.
(make sure they correlate to the type of colorblindness)
and then make sure to dress in solid conflicting colors.
makeup too for extra evil points.
all the other disabled and crippled?
just put everything slightly out of reach.
works on everyone.
I  promise