Directly there is no "downside" to the employees. Here's the problem with your theory. Companies issue stocks to raise capital. They do this for one of three reasons:
Start a business
Expand a business
They're going broke
US AIrways is a current company, thus not starting up. Parker has made it quite clear that in his opinion there is too much capacity in the current market, so any expansion of the company would be utterly and completely... stupid. The third option, going broke, is the only one left. It's a screen pass on 3rd and 10. The company is short on cash, and likely needs funds to pay debts, so they're gambling that investors will take the chance at potential money. This is not a good sign of a companies viability. It doesn't necessarily mean the company will sink, but it's an indicator of rough waters ahead.
And Freedom, please, for the sake of your fellow employees STOP GIVING FINANCIAL ADVICE!!!! I'd really hate to hear about some dumbass listening to your incredibly moronic advice to max out credit cards and having to file for bankruptcy.