When a software vulnerability (something that would let someone who knows about it do things with your computer that you don't want them to do, if you run that software) is found, there are two basic schools of thought on how to handle it.
1. Full disclosure. Tell everyone and anyone. This compels the people who made the software to fix it, and compels people who use the software to get the update. This also means that, until it is fixed and everyone updates, a lot of people will be able to exploit it.
2. Security through obscurity. Tell no one and hope they don't notice. This minimizes the number of people who find the exploit. Useful until a fix is ready, but too often this becomes a substitute for actually fixing the problem at all.
Apparently the person or group who made the image believes (or claims to believe) that the former is in fact a grand conspiracy to rob you of your hard-earned dollars to buy security software.
More likely it's some "l33t hacker" mad that their pet exploit got out into the open and fixed, so they're throwing an extremely public tantrum. Either way, nothing for us to worry about, beyond waiting for Imageshack to get unhijacked.