The worst company I have ever worked for, Device Anywhere, tried to get me to sign a one-way non-disparaging agreement as a condition on my receiving a 4K severance. I refused.

The CEO was an asshole and was having the company pay for his candy red porsche as well as taking a hefty portion of the sales commissions whilst laying people off due to lack of funds.

I hated that company. Never sign one of these agreements.