Huh?
Heh.
This is the same scaremongering that went on with comet elenin.
You have to believe that ison will somehow do something magically that violates physics and orbital mechanics to do what you are claiming.
Objects heading towards the sun speed up on the way in.
On the way back out they slow down by the same rate.
Ison is no different and will not violate those well known and established laws of motion.
Disagree all you want, but you would be just as wrong as the people who claimed comet elenin was going to kill us all.