Civil liberties were the hot topics across social media last week. Bloggers debated the Supreme Court decision on gun ownership and Finland’s law making Internet access a legal right. Twitter drew attention to the discovery of a privacy leak on the website Foursquare. On YouTube, a video purportedly showing oily rain in the Gulf region led to controversy.

Coverage of the disaster in the Gulf of Mexico edged out gloomy economic news and the mostly routine Elena Kagan confirmation hearings last week. But even as it regained the top spot after a one-week hiatus, there is evidence of diminishing media interest in the BP spill saga.