Actually not true :p are we going to go back to the space stuff again?
People need to stop thinking of black holes as holes. They are not holes at all! They are points. Think of them as marbles that have the mass of our galaxy. But since their mass is so great, they cannot support a size, the gravity would be too great that the outside of the marble would always be falling back to the center.
So instead it's just an infinitesimally small point!
So basically if one marble that had a mass of 1,000,000,000,000 suns, swallowed a smaller marble that only had the mass of 999,999,999,999 suns, you'd just end up with a bigger marble.
Supermassive black holes (such as ones at the center of galaxies) swallow lesser black holes all the time. It's just as regular as any of the other crazy wild shit that happens in our universe. Shit people cannot even begin to fathom.
But yet, us humans think we are so freaking big with our guns and our politics and our inventions. If a black hole wanted to swallow us, that black hole don't give no fucks. We won't have a nuke big enough.
I know how I want civilization to end though; from a rogue star. Essentially when supermassive things like black holes (which are not stationary) come into the path of star clusters, it tends to fuck their day up. With all the tidal forces and the immense gravity, it is relatively easy for one to shoot out. The mass of the black hole would just whip it around, like a sling shot.
That star (may 100 times the mass of our own) would just go hurdling through space at thousands and thousands of miles per hour. With no destination in mind it could come right into our solar system and burn us all to pieces. But I will have already skied enough days to not sweat it (:
