I have gotten a little info on this (that I posted in a similar topic over in the camping boards also). I e-mailed Shane Perez about this and I did get a response. He says that he DID NOT go out there this past december on his exploration of the island. In fact, he says it was a good 5 years before he posted the photos that they went over there. This is likely because of that statute of limitations on trespassing in the state of FL being 5 years. Since he waited 5 years to post the photos, Disney can't come after him now and charge him with trespassing. Disney can still ban him whenever they want though. My question is though, if they banned him, what would that actually do? It's not like he couldn't still drive right in if he wanted too. I honestly don't think he would care too much though if he got banned. He is an urban explorer. I think he would manage to get by and still find thrill if he didn't come back to WDW.
If you look on his blog, there are a few pictures that seem to prove he went a while ago. In one of his pics, the RC water tower is still in RC. As some of you may know, the water tower has been removed from RC and is now by the FW pool area. Also, there is a sign that says not to enter RC, which currently is not there and the coke bottle that is there is clearly very old (however that might not prove much, but nonetheless...). So, that's basically what i've managed to gather from this whole thing.