You are

 The winner 

It makes you feel good

 To harass a sixty year old woman with disabilities 

You don't have a disability

 You able body 

You should feel good

 Because you can harass a handicap person 

That makes it bad

 For people who have real disabilities 

I was like

 Is this your cane 

And

 Forgot he had a cane 

He walked

 Away 

I was in line behind a

 Guy and he was so into whatever he was doing 

 

Any adults in the room

 To tell the 5 yr old to stop slamming the cabinet