Not only clear of clouds, but I hope he was able to remain outside all other areas of Class B and C airspace since I presume he's not transponder equipped. Heck, I wonder if he even had enough surface area to be a radar target so that other aircraft could be advised to avoid him.
I imagine his variable altitude between 11,000 and 13,000 ft wasn't within VFR guidelines either unless he stuck 11,500 (eastbound). Then again, w/o ATC, you can only guess your altimeter setting, or rely on GPS
I'm sure the FAA wouldn't mind talking to him. Though I'm not sure he has any license to pull as the article I saw never mentioned, so he might only be subject to fines again.