At least some of the provisions are not enforceable, but the idea that all you have to do is step outside the line and Trump's asshole attorneys will; call and threaten you would deter most people from crossing the line. You would have to hire a lawyer to defend yourself for just saying that some typical stupid thing a Trump did in the future was indeed stupid.
Sirs,as much as he likes to lick the boots of Trump, will not sign this, and neither will you.
The latest is that Trump is not paying his hired staff people.
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Trump won't submit his taxes, even for years that are not under audit, he stiffs his staff and he forces suckers and saps who volunterr for him to sign a ridiculous pledge of eternal loyalty.
Hillary does none of that.