Real Time Chess – A physical chess board without the concept of turns

Does the system of electromagnets do anything to enforce legal vs illegal moves? Seems like another way for your untrustworthy friends to cheat. When your opponent's distracted, just put your queen anywhere you like.

Also, is there a rule about moving one piece at a time? I was surprised I didn't see anyone two-handing it. If it were me, my opening move would be to grab 4 pawns at one (2 in each hand) and shifting them all forward two spaces. That would have been my first instinct.

No. The intention with the electromagnets wasn't really to prevent malicious cheating, just mostly to enforce cooldowns since it's very easy to forget/miss the different color of lights. The games are generally very chaotic and due to user error there are usually a few incorrect touches throughout the game that have to be quickly corrected manually anyways, so enforcing legal moves wouldn't make the experience better.

As for moving multiple pieces at once, the rule I have is only one hand and one piece at a time. This goes a long way towards preventing accidental bumps into other pieces and weird board states where there are multiple pieces in the process of being moved at once.