Told mine the same. Plus drag them along to trail days to put some dirt back...
Tell you another good one, #1 son changing gears, standing up, cranking and accelerating, clunk-clunk-clunk
Shouted at him numerous times, telling him he was destroying the cassette and chain. Explained the old saying of 'Change gears like your cassette teeth were made of glass' with no avail.
Cassette fucked, lost a gravity enduro because of it. Gets a $250 cassette as part of his chrissy presents last year... hasnt shifted under load since.
They have had many warnings in the last year, I will not pay or replace parts for laziness, show off's or percieved cool shit that wears out a bike or parts.
This laziness specifically is about not pumping up tyres before every ride, then denting alu or smashing carbon rims.
Like your kid doing a burnout to show off then coming with his hand out for new tyres.
I think they are starting to get it