Because that is where people are, where my friends and family are. Facebook has it's negatives, but the positives out weigh the negatives. There is so much content of interest on Facebook--things that interest me from model car groups, diecast collecting groups, car groups, dog rescue groups, terrier enthusiast groups, etc...it's taken the place of Usenet news groups (80s-90s) and Yahoo groups (00s) for interests...