I think the opposite is true. Girlfriend uses Facebook (I do not). When she says 'got to see this...' I ask if it is on Facebook, and, if so, decline being interrupted to look at whatever it is. As for 'this is really funny!' my response 'is this another Facebook joke?' is how I am able to filter out the lame humour - if it is on Facebook it is rubbish humour, simple as.