A trio of social media stocks is getting pummeled this week, a sign that Wall Street may be unwilling to overlook missteps at some of its Internet darlings.

LinkedIn on Thursday plunged as much as 25 percent in after-hours trading after the professional social networking company forecast second-quarter sales that were weaker than Wall Street estimates.

The drop followed the declines of two other social networking companies. Twitter shares are down around 25 percent this week after the company reported quarterly sales that fell short of expectations, while local reviews site Yelp plummeted 23 percent on Thursday, a day after it too posted sales that disappointed Wall Street.

The performances illustrate the way investors are questioning whether social media companies can keep their growth rates vigorous enough to justify their valuations. The stocks of all three companies had traded at relatively high levels, reflecting Wall Street’s giddy projections. Yet all three shattered that perception in their own way. And while many of these stocks are often volatile, with investors on edge about the weak economy, interest rates and other issues, shareholders increasingly have little tolerance for the slightest misstep.