&gt; My friends who don&#x27;t use facebook will regularly miss (or not get invited to) parties, book club, skiing trips, etc. This isn&#x27;t because no one likes them or thinks to invite them...<p>Clearly it is, unless you make a conscious decision for every gathering to only include people via Facebook. Does no one ever stop and think &quot;Hey, Jake is pretty cool but he doesn&#x27;t use Facebook. Maybe someone should call him?&quot; I&#x27;d guess that no one thinks like this, and that his omission comes from simply not thinking to invite people who aren&#x27;t on Facebook.<p>I&#x27;d love it if you could explain that I&#x27;m wrong and that you are making this conscious decision to exclude them. The justification for this would be even more interesting.