This is just your google filth again.
The more sites in the serps which they show this message for - the more likely people are to click on their adwords sites.
They could EASILY drop the site until it was sorted by the owner.
Ahh - but that would mean them not getting the benefit of hacked sites.
Come on guys - think like google - multiply this across the net - it will be making them a lot of money.
Dont go thinking "google police and all that" - they are not police - they are greedy - and they will kill all sites eventually who arent paying to be on page 1.
How come hardly anyone here can see this? I find it infuriating.