Actually
The people you should worry about are the ones that barely fly.
Having 200, 500, 700,1000 HRS does not mean anything although many will justify their professionalism by having multi digit hours.
"you are only as good as your last landing"- P.J.
In my view or rather from what I have seen, you have to spot someting really unsafe before you can make an issue of it. As far as my superior knows, what I deemed unsafe was not close enough. *I'm simply too strict towards PPL holders*
1/60