Judging by the famous "shot in the balls" quote, Snowden has probably changed his outlook a little since then.
Or, of course, he could have been leaving this type of trail of online activity precisely because he knew it could be observed, and wanted to put himself in a particular light for anyone doing so, if he was already intending his exfiltration of data or some such act at that stage.
That's probably just wishful thinking on my part, though :) More likely scenario, quoting from the author of the material linked: "So Snowden was young once, and said anything that occurred to him? Imagine my shock!"
http://arstechnica.com/tech-policy/2013/06/exclusive-in-2009...