Regarding 2.) this may be true in the sense that our conscious experience of the world does not neccessarily accurately reflect on it's scientific reality. However, that has nothing to do with quantum physics.
As for 1). he may be talking about the observer principle here, which means that...
Well, I'm not sure what you mean by stable here.
Both electrons and the nuclei of atoms can exist freely from each other so they would be in fact stable subatomic particles.
It's the same issue you have when looking at anything: the further you look, the wider your field of view gets, but the smaller the individual things you see appear. If you'd imagine the plane you were standing on was painted with a black grid on it, all the lines would converge at the horizon...
Well, that's not quite on the money. I'm sure experimentalists would be very interested, but by definition, virtual particles can only exist for extremely short periods of time, as determined by the uncertainty principle, and are thus untestable.
However, technically, the particles given off...