I'm going to use the handicap stall
Why would you decide to use a handicap stall when you are not handicapped?
I'm not comfortable using it, but I know there are people who need it very much, especially the old ones, and I like messing with them.
Seeing that you have no disability, using the handicap bathroom stall creates a hardship for others who need it. Use the regular toilets and show some compassion for others' plights.
Since when did people care so much about the welfare of others?
Most people care for the welfare of others. You should put yourself in the shoes of a disabled person.