Earlier quoted context omitted.
Sadly, I think the bad behavior is relatively common. Two of the last three SV companies I’ve worked for assert ownership over everything you do or invent, even on your own time and on your own equipment at home. I don’t know if this is super common or not, or whether or not it’s legal, and I’m certainly not going to spend $XXX,XXX on a lawyer to find out!
That's why this needs to be illegal. The regular guy doesn't have the money to fight stupid contracts.
But that just means they can't enforce the contract as to work it can't legally apply to, not that they can be hit with penalties for drafting the contract that way. If they choose to fight over it, you'll still have to fight.