I have only been abducted once, I am level ten on rocket science skill, been sixam numerous times and talked to the aliens on there, carry plenty of space rocks, I am doctor and have discovered an alien in disguise and have also used the satellite. So I guess it is completely random sadly :(
I've repaired numerous times....normally uninstalling wouldn't bother me...its just i took a long time on that house building it like a week and I don't want to lose it :( plus all the family achievements