I think that would be a red line for a lot of people, as in "you took my life savings, now I take it out of your hide".
One of the first things I did when I started my own company was set up a solo 401(k) plan and roll most of my previous retirement funds into it. I did this because I wanted to have more control over the money in case the government monkeys around with these 401(k) laws and regulations.