There are some LEGAL businesses that are usually a turnoff politically.
Used cars salesman
Abortionist
Repo-man
Debt collectors
The fact that Romney gutted some companies leaving the employees without any hope (or pensions) is disgusting...
...and is worth discussing.
You really don't know what you are talking about here. Gutting companies is not how Bain Capital makes money. Companies that ended up going under represent failure for Bain Capital. It means that Bain Capital invested tons of cash to float the company and ended up losing it. And in every case where this happened, the company was about to go under anyway. Bain Capital simply delayed the inevitable.
You also ignore the successes of Bain Capital as well as Bain. Consider the employees of those companies who were saved from going under.
Bringing up Bain will only cause voters to support Romney - not oppose him.