I don't update my status much but I doubt the absence of those joining-pages updates while really make a difference to my feed cos my friends have like.. almost everything they do on facebook get shown up on the feed. If I could I would turn off those joining-page updates for sure. Some groups are funny but 90% of the time they're wasting space x)
Speaking of facebook:
lulz. That was a photo uploaded by my friend. Not sure what it is but it's edible. I think it's like.. some kind of cake.