Dump Or A Break-Up?

I got into a discussion recently about whether or not a friend of mine was dumped. This led to the larger question of what differentiates a break-up from a dumping. After much thought, here is my distinction:

I and my friends get DUMPED.
I and my friends BREAK UP with people.

There are exceptions, of course. On at least one occasion, I've been the asshole and dumped someone (it was a Y2K thing). But, in general, this is a great rule of thumb. Or middle finger, as the case may be.