I only today discovered/realized (thanks to Stephan Planken) that a lot of the people here on FF are also on Twitter. I am on Twitter but I treat it completely separately from my FF posts. Most things I post on FF and not on Twitter. Those Twitter people are missing out ;)
Our previous cat wandered all over the yard and made sure other cats stayed out. Our current cats aren't so territorial, and these two visiting cats have learned that they can hang out in our yard every once in a while without our cats discovering them.