Concerning the bit about Jesus returning "invisibly", I've always had this question: does the thousand-year reign start when he returned invisibly or during the new system? Because if he really did come in 1914 (which is total BS), then that would already be 100 years down (in 2014), unless that "1 day for 1000 years" rule comes into play again.
Aware - that's an interesting scenario. It reminds me of something that I told a JW the other day - he said that God told Adam and Even to be fruitful, multiply, and fill the earth, and that this will hasn't yet been done. I replied that there are 7 billion people on the earth right now, and filling doesn't have to mean that every bit of space needs to be occupied by humans, since there are things like forests, farms, and other resources that need to be present in order to sustain human life. I told him that 7 billion is a number that fills the earth pretty well, especially when you consider the fact that there are highly populated areas on the earth, beginning with India and China. The earth has been filled - it may not be in the "New System TM ", but it's been done.