Even if he didn't clean it, dust should not be in any way be an excuse to void ones warranty. Also the fact that Sony demanded 150$ for cleaning his unit of that dust is quite.....enraging.
Edit: i mean for pete's sake, how can that hardware be considered futureproof if something as simple as dust can do it in anytime?
Deep into the darkness pearing
Long i stood there
Wondering
Fearing
Doubting.