Ah yes, meaning to 'help'. . . and after xx number of years, you'd think they've noticed we do things differently, but no . . .
In fact, at our house, my DH and sons only own things that can survive ANY type of washing and drying. They now do their own laundry and look out for each other - asking for extra clothes that need washing to fill up a load. Pretty cute!! I don't even put anything down the laundry chute unless I know it can survive one of their loads.
They've also learned to set a wet load of mine on top of the dryer for me to sort and dry/partially dry/lay flat/ hang/ etc.
You're SO not alone in this well-meaning-guy issue