I have a Galaxy S5 and this afternoon I opened Facebook on my laptop. On the right sidebar, Facebook was asking me to contact everyone on my telephone contact list to get them to join. The entire list was there along with their phone numbers. I deleted all of them but now I'm very angry. I realize that I am the only one who could see the list but that is only partially true. If there is any kind of tracker on my laptop, hackers could have seen it. Needless to say, I feel this is a serious breech of faith by Facebook.