Yes, the ECRB is not clear on this at all. I have not looked at LoNH yet.
So I take it your characters has cybernetics. Are they invisible to the naked eye? Easily covered up? or indistinguishable from the normal body?
If you answered yes to any of these questions, then for the most you should never have an ion weapon fired at you at the start of combat. If your implants can be seen only after your clothing/robe has been moved away, in the case of an arm, then I could maybe see that after a few rounds, someone might notice that you have implants and may fire an ion gun your way.
If you are not an overly flashy cyborg, but in every fight you face off with these types of weapons, it is your GM that is broken, not the system. It could be better though. I would have a serious talk with your GM if this is the case.
I had a player a while back take a nasty crit and it reduced his Intel by 1 permanently. It went from 2 to 1. I allowed him to get a micro brain implant thing that brought his intel back up to 2 for something like 10,000. No one would ever be able to tell he has this without a CT Scan or something similar, as it is in inside his skull. Another player was all worried about this because he was afraid I would start using ion weapons against him. I was just like WTF man? Are you serious? We have only been gaming together for 8 months, and you think I would pull something like that? I was given the answer that most GMs would...Needless to say I was appalled and mortified! I have never done that to him nor would I. The ability to buy a book and "read" it does, not automatically grant the ability to Game Master.