Every one of them, in my experience. I think I've waived that particular clause (or refused to sign the agreement) five times now for five different employers.
You just need to mention it when they give you the agreement to sign. By the time there's a piece of paper printed out with your name on it, they're committed. And on the other side of the table from that piece of paper is the guy who hired you. A reasonable person that can recognize a silly clause when you point it out.
Just cross out the paragraph, initial next to it, then sign and hand it back. If they want to make a big deal about it, it's them making the big deal, not you.
You just need to mention it when they give you the agreement to sign. By the time there's a piece of paper printed out with your name on it, they're committed. And on the other side of the table from that piece of paper is the guy who hired you. A reasonable person that can recognize a silly clause when you point it out.
Just cross out the paragraph, initial next to it, then sign and hand it back. If they want to make a big deal about it, it's them making the big deal, not you.