Via Newsweek Tumblr.
Looks like this video and billboard hijacking is the work of DesireObtainCherish, an LA-based street team. The work isn't exactly great art, but it's an amusing form of culture jamming, in which anti-consumerist activists subvert public advertisements.
According to the tags on the original blog post it's in east LA.
I kind of wish they'd done something else; the sentiment, while fun, isn't exactly deep enough for my tastes. But I'm not sure what.
What would you have written instead?