Of course there is. The blockchain is a public ledger. Sweeping coins to an address and then posting about it and the address is exactly that. The word will spread quick enough, as was shown in johoe's case.
Not everybody reads this little pit on the side of the internet. Not everybody speaks English. Unless it's a very high profile event "saving" someones money will just be theft with no positive identification. Especially in the cases here, the private key was exposed so it could never be proved who owned it in the first place.
Yes, I think it makes a difference. This thread is about the R values. You claim that there are more flaws to be found. This could be motivation to poke around some more.
Lay off playing the concerned. There's a balance that needs to be struck no matter how you look at it. If people don't voice concern about the security practice of a company, there's an assumption that everything is just fine.
I've given no information that could aid anybody in finding vulnerabilities in their code. This is important.
Please refrain from giving a step by step instruction on how to hack people's addresses.
I highly respect what johoe did but I think he got carried away with his new 'fame' by telling everybody how he did it.
Not cool.