What's the definition of "wrongly/badly"? Now that's thin ice to me.
If you think of it, it's nothing but layering, i'd say. I want certain qualities from the original sample mixed in with changed/exaggerated qualities caused by compression.
I could of course do that on two separate channels.
But if i am true i don't know if i do it very often or always? Same as with sidechaining something to something; but i daren't say it's useless or bad practice just because i don't always/ever use it.