Facebook has dug into its data a bit and can give us some semblance of an answer: It wasn't just you; a ton of people changed their pics over to the Human Rights Campaign's equality sign (or some variation thereof) on Tuesday. It's impossible to get a precise number, but Facebook says that 2.7 million more U.S. Facebook users changed their profile picture that day than on the Tuesday before, a good stand-in for a null hypothesis. In general, the crop of people who changed their pictures this Tuesday as compared to last clustered around age 30, with roughly 3.5 percent of 30-year-old U.S. Facebook users taking part in the action.
If you are friends with a generally pro-marriage equality bunch, you probably saw your Facebook News Feed morph into a stream of red and white equals signs earlier this week as the Supreme Court heard two cases on the rights of gays to marry in this country. Was *everybody* seeing this, or was it just you and your liberal friends?