I think what bothers me the most are the potential victims and real world consequences of this stuff.
And I'm not talking about the people who get excited and their hopes up about these leaks, that's something most of us can brush off as no big deal. What I'm talking about are actual potential victims, people who end up having to pay the price for others' online shenanigans.
For all we know, that gaming website might have been bombarded with 100's of e-mails from people asking about the new Sims game pack, when will it be available, asking for more info about it, why aren't they able to find it on the gaming page now, etc etc.... and the poor people at the receiving end of those queries having to waste their time answering all these e-mails, which takes them away from their real work, which costs a company money. In the world of business, time is money. So who has to pay that costly bill just because some toddler on the internet has too much time on their hands? The toddler certainly doesn't, so that means the company is an innocent victim in this case and would have to absorb the excess administrative expenses into their monthly budget. For all we know, that company is on the verge of shutting down because they can't make ends meet. Maybe that added extra time and money puts them over the edge and they have to shut their doors putting real people out of a job. Who knows what the real world domino effect might end up to be with this "prank"? That's the problem.
There are real world consequences that can happen in these types incidents. There are real world consequences that happen with every decision/action we take, thus we need to chose carefully. People need to stop and logically think through their actions before taking said actions to be sure that you're choices don't have a negative impact on some innocent party on the other receiving end... It's the grownup thing to do.