Re: Just remember...
"I am a non-producing entity, and have no way of producing it. Should I have to post the billions in a bond just to be able to sue them for stealing the idea?"
It's risk and reward. You could spend $100K to produce 1/2 a dozen motors and sell them and then sue or post a billion dollars and sue or weep quietly into your beer.
What posting a bond does is stop the $2 company with the patent on rounded corners suing you, costing you hundreds of thousands of dollars and folding up when they lose leaving you bankrupt even though you won.
As for your car example, I invented an improvement for engines, got sued by another company, won and was still left with a massive debt despite winning. I've experienced this crap first hand.