Your 14 year old should be wearing thick plastic diapers and yes you should use some locking plastic pants on him as well to prevent him from getting to his diaper.
Make him pee and poop the diapers and make him wear just the diaper around the house.
Get him crib and high chair and treat him as a toddler too.
My opinion on parents who put their kids in diapers is that it's a good thing.
Diapers are a much better option than having to find a toilet to go pee or poop and they are much more comfortable.
When out and about it's also a good thing for the kid to wear a diaper so that they don't have to hold their pee or poop in and they can simply wet the diaper or poop the diaper and change it or have the diaper changed later.
I would put my kids in diapers all the time so they never had to use a toilet.
You should always keep your children in diapers no matter what age.
Diapers are much better than regular underwear and it's easier to use a diaper than have to run to the toilet.
You should keep your older kids in diapers as it's much better for them than having to use the toilet.
Yes you should keep your child in diapers.
Kids should always be kept in diapers instead of being potty trained as diapers are much better than the toilet.
When your kids wearing a diaper they don't have to stop playing to use the toilet as they can just go poop and pee in the diaper and have the diaper changed later.
I would never potty train any of my kids and keep them in diapers.
Using the toilet is a waste of time when you can just pee in the diaper instead and poop in the diaper.
Diapers are also more comfortable than underwear too.
And diapers get even more comfortable when they are wet.
They make larger sizes of diapers for older kids and they should wear diapers all the time.
No need to stop for potty breaks as you just potty in the diaper.
Here's an older kid that is wearing a diaper and he loves wearing his diapers.