US Companies involved in financial statement misrepresentations

Saw this from this book "Financial Accounting" by Libby/Libby/Short, McGraw-Hill.

Sampling of firms involved in financial statement misrepresentations:

• Enron
• Worldcom
• Adelphia
• Global Crossing
• Computer Associates
• Tyco
• HealthSouth
• McKesson
• Xerox
• Rite-Aid
• Aurora Foods
• Halliburton
• Parmalat
• Nortel
• Goodyear
• Cardinal Health
• Homestore.com
• Dynergy
• Fannie Mae
• Freddie Mac
• Qwest Communications
• Gerber Scientific
• Stanley Works
• AIG

I think most of them are quite old news already.
Generally, I'll avoid stocks with such negative news unless I have a good understanding of their management to discern if it is a once-off event or there's more to it.