After Enron executives sold large amounts of stock, the company barred employees from selling shares in their 401(k) plans last fall as the price plummeted.

After the tsunami, the company has barred rank-and-file employees from speaking publicly.

For example, it could bar tax-supported hospitals or public employees from performing abortions not necessary to save a life.

Other companies have gone further, barring employees on the job from using cellphones at all to eliminate potential distractions.

Enron barred employees from selling this stock before age 50.

Several news media outlets, collectively, for barring employees from attending the rally on their own time.

The agency's ethics code at the time barred former employees from representing outside vendors for two years after their departure.

He also barred employees from jogging on lunch break, under penalty of losing time from annual leave.

Federal law and House rules bar Congressional employees from doing campaign or personal work for a Congressman while being paid with tax money.

When the firm went public in May, it barred top-level employees from selling shares for three years.