Planning social engagements with friends. I can easily see who is going, let organisers and everyone else know if they want to that I may not make it, as well a

Planning social engagements with friends. I can easily see who is going, let organisers and everyone else know if they want to that I may not make it, as well as see if there are other engagements that I've already agreed to go to. I could do this with email and calendars, but I don't know 95% of my friend's email addresses. We talk over SMS and Facebook Messenger. If I wanted to find another one of my friend's I just search for their name, and if they have privacy settings set to only allow friends of friends to search for me - that's OK too! I don't have to ask a friend for their email address, or their phone number and then ask that person for their email address. I don't have to phone or SMS people to see if they want to come, and I have an easy way to track it. Sure, we all got along fine before social media. But Facebook has made planning social events ridiculously easy. I haven't posted on my wall since 2013 and none of my information like age, email, phone number, etc is public. Sure Facebook has access to all sorts of conversations I've had over the years, but so do my local ISP's and data centres. For anything that I'd truly like to keep private, I use PGP, OTR or chat in person.