AITAH, told a teenager I thought that was for disabled people.

In target today, I saw a teenager riding one of the store scooters while swinging his leg off the edge. My son, stepped backward, almost got hit by the kid on the scooter. I quipped, I thought those were for disabled people. The kid on scooter said nothing, but his friend spoke up and said his friend can't walk because his leg is all scrapped up, I responded OK, if you say so and began walking away." He then holloered, you could be nicer about it, I did not engage any further.