If I saw a 10 year old boy naked in Walmart I would immediately notify some staff member such as a Manager as it's not allowed for anyone to be naked in Walmart.
Then the manager would ask the 10 year old to leave or put something on.
If the 10 year old boy would not leave then the police would be called.
I once saw a 10 year old boy wearing just his boxer shorts and a shirt and shoes and that was okay.
Also saw a boy about 10 years old who was Autistic wearing just his diaper, shirt and shoes in Walmart Yesterday.
It was hot out and I could tell the 10 year old boy was Autistic and most Autistic children have a hard time potty training.
The 10 year old boy was wearing Pampers Cruisers size 7 diapers which fit him pretty good.
That does not offend me but going in without clothes in public is not an option even I would not allow my kids when they were toddlers or babies to be in public naked.
In public they had to have at least a diaper on.