The only pony I've ever thrown away was the most disgusting, swamp creature-esque Glitter Shine G3.
![Eww :X](https://mlparena.com/Smileys/default/sick.gif)
I don't know where she'd been in a past life and I wasn't about to find out.
Otherwise no ponies get thrown out, even fakies. There's always someone out there who'll want them!