I see them come and go, it's the natural of the business; but I do wonder why they cease to speak? Just because you dance with another group or teach does not mean you can't speak; or does it?
It this what the dance has come to....us not being polite to one another, we share the same love. Too bad that when we shift sides these type of things have to happen, everyone is entitled to their own form of expression.
We all move on, it's understandable. It's a good idea not to tear down a bridge, if you may have to cross it again!