But at software engineer salaries, it's not that expensive to get legal advice for this. I did it once, when a company I'd worked at for over a decade was bought out, and insisted everyone sign onerous contracts including broad IP assignment. I read the contracts carefully, marked them up with specific questions, and spent $300 on a half-hour consult with a lawyer, who said it was pretty much all enforceable in my state. (So I left the company, which worked out fine.)

That's like saying, "it's dishonorable to agree to a contract to kill someone knowing full well such a contract isn't enforceable."

If one party holds all the cards in a contract negotiation it's never truly being negotiated in good faith in the first place. Furthermore, one could argue that without having an expert on contract law right then and there available to answer any questions about any given contract means it falls under a "lack of capacity" for basically anyone who isn't a lawyer.

Employee agreements often fail in courts because of:

    - Duress
    - Lack of capacity (e.g. due to overly complicated legalese *specifically written to be hard to understand*)
    - Undue influence (e.g. company says they'll hire someone else if you ask to get the contract reviewed by a lawyer before signing)
    - Misrepresentation (e.g. job was described as "X" but turns out it's "Y")
    - Non-disclosure (e.g. candidate was not told job would require purchasing products or services sold by the company itself or a partner)
    - Unconscionability (e.g. some term or terms in the contract are so unfair that it cannot be allowed to stand... Like a non-compete that says you can't work within 50 miles of your former place of employment if you leave)

The "usual one" is unconscionability: Employers have unfair bargaining power almost all of the time and judges and juries are easy to convince of this. Also, these sorts of things don't usually make it to court unless there's something ridiculous in the contract. What's interesting is there usually is something ridiculous in every employee contract. It's just that those ridiculous things aren't usually the part of the contract a company is trying to enforce so they don't come up as often.

It's even more dishonorable for a company with a legal team to offer up terms in a contract that are explicitly illegal, and then use those illegal terms to conduct unfair and deceptive business practices in the labor market.

In fact, that scenario is so dishonorable that in some states you can ask the court for triple damages if the employer tries to enforce the noncompete

Dishonorable? I don't think so. They're the ones trying to trick employees into immoral and illegal obligations. They only have themselves to blame if it blows up in their faces. They played the game and they lost.