Maybe keep in mind too that what people post on facebook might be a mere reflection of something they are also working on or struggeling with too. A lot of people don' share the less then postive experiences on facebook, like Genetic is talking about with the outwardly appearance. They are posting it and ro me that says they are trying to work on it probably, not they "arrived" and it's perfect. It's hars because we don't get to see the whole deal, just a small glimpse.
If you look at people signitures here PD you see lots of positive messeges, however the person is still struggeling. Maybe it is a reminder for themselves, I have often done that.
Genetic, not sure who that is but I feel inspired to go do a search now.

thanks!