@CottonTales  
Maybe she DID. You’ll notice by Hearts and Hooves day it was already rebuilt.
 
@YenaMuffin  
Ha ha ha That’s probably right.

Derpy Hooves is the pony equivalent of J.R. “Bob” Dobbs- she is lucky, not smart. In fact by the Equestrian Institute’s ‘Standard Table of Intelligence’, she is gifted with incredible ignorance. She lives in a perpetual state of contracted consciouslessness. This enables her to act without thinking, to surf effortlessly on the luck plane, to float down the fabled “Path of Least Resistance”. In fact, to make a million bits every time she screws up. Thus it is not her wisdom, but her devine follies, her holy blunders that we should emulate.

inb4 Derpy Ducreux.

could be her crazy luck goes both ways: causing both massive disasters and awesome successes.

Maybe she’s a retarded billionaire…could happen.

If she’s a billionaire why didn’t she just pay to rebuild town hall?  
She may not have caused all the damage but she didn’t help

Derpy is an eccentric billionare?
 
That might just be my new headcannon…..
 
…. yep, there it is. Headcannone;!

She also loves cider and good ol fashioned song and dance, because she was all over that Flim Flam Brothers song.

… I’m going to allow this.

She attends all dat ritzy shit.

Haha, that’s our Derpy.