Hmmmm well in their defence, photos taken on a winters day when it is wet will never make anything look pristine.
The damaged stone looks like frost damage and replacement may be in hand though it does look like it has been like that for a while, but again see the first comment.
The damaged grave statue etc is possibly due to careless mowing, but do you leave them damaged or remove them, as either is likely to cause upset.
The stones do look like they could do with a good wash, but again refer to the first comment and regular scrubbing and using detergents may damage the stones.
Finally such a tragedy to lose their only son at such a young age and my heart goes out to them
