I'm going to yell at a disabled man for touching me
Was it on accident or did he have a valid reason?
I don't think he has a reason, I'm guessing he might have done it just because he can
If he touched you for no reason then you have every right to be upset. It doesn't matter if he is disabled. No one should touch anyone without permission or reason.
I'm going to make fun of the man so he doesn't repeat his action.
Reprimanding him is enough, you do not need to mock his disability.