Not likely, but I doubt its rigged, you see a lot more hands online because of the "instant" shuffle capabilities you are more likely to see a much crazier hand. For example say the actual odds of four pocket pairs in one hand are 1 in 50 million, well a random generator of cards by a computer is actual not so random in a sense and it was time for such a hand to take place. Nothing against you, and nothing against any other player like some people think, you just see bigger hands online because of your ability to see more hands in a shorter period of time.
haha poker is not rigged you just have to assume that your hand could possibly not be the best hand despite what you see on the board take into account how that player has played and what they bet...read them
Pretty sure fulltilt is one of the better ones. And the odds are slim, but anything can happen. It doesn't make it rigged, get away from lesser pair, even jacks.