Based on the aggregated intelligence of 170,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, online radio company Pandora Media (NYSE: P) has received the dreaded one-star ranking.

With that in mind, let's take a closer look at Pandora's business and see what CAPS investors are saying about the stock right now.

Pandora facts

Headquarters (Founded) Oakland, Calif. (2000)
Market Cap $2.14 billion
Industry Broadcasting
Trailing-12-Month Revenue $167.2 million
Management Chairman/CEO Joseph Kennedy
CFO Steven Cakebread
Trailing-12-Month Operating Margin (1.6%)
Cash/Debt $43.7 million / $7.4 million

Sources: Capital IQ (a division of Standard & Poor's) and Motley Fool CAPS.

On CAPS, 80% of the 248 members who have rated Pandora believe the stock will underperform the S&P 500 going forward. These bears include All-Stars TMFBreakerJava and TheMiracleDJR, both of whom are ranked in the top 10% of our community.

Just last week, TMFBreakerJava touched on the stock's seemingly unsustainable valuation: "Buying this IPO requires that you believe that Pandora will continue to grow like crazy, establish a moat based on network effects and fend off significant competitors. It might happen, but investors are taking a lot on faith."

In fact, Pandora currently trades at a lofty price-to-sales ratio of 11.8. That represents a clear premium to gorilla music-streaming threats like Sirius XM Radio (Nasdaq: SIRI) (4.3), Apple (Nasdaq: AAPL) (3.4), and Google (Nasdaq: GOOG) (5.1).

CAPS All-Star TheMiracleDJR elaborates on the Pandora bear case:

Beyond laughable. Cool, well intentioned company, but who the **** has time to sit and listen to songs all day long hoping to find one decent one. I also think songs have an emotional intensity as well as a specific style and I'm not sure that just because two songs each have a flute or similar bass-line that they are all that similar. I think this is an utter disaster as a public company and that it won't exist 5 years from now as one.

What do you think about Pandora, or any other stock for that matter? If you want to retire rich, you need to protect your portfolio from any undue risk. Staying away from dangerous stocks is crucial to securing your financial future, and on Motley Fool CAPS, thousands of investors are working every day to flag them. CAPS is 100% free, so get started!  

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Fool contributor Brian Pacampara owns no position in any of the companies mentioned. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Fool's disclosure policy always gets a perfect score.