Suppose the Mean 6 got to the other Ponyville citizens

[BrawnyCharger 513]

Let's say that the Evil Mane 6 clones created by Chrysalis managed to get out of the Everfree forest and into Ponyville. Imagine the sort of damage to the reputation of the real Mane 6 they would have done.

What sort of evil do you think they would commit in Ponyville? What sort of lies would Evil Applejack have told the other Apples? How would other ponies as well as Discord have reacted to Evil Fluttershy's bullying? How would Spike among others have reacted to Evil Rarity's greed? How would others have reacted to Evil Pinkie Pie's grouchiness and boredom, particularly with Maud, Limestone, and Marble? How would other ponies have reacted to Evil Rainbow Dash's dismissive apathy? And how would Ponyville have taken to Evil Twilight Sparkle's powerhunger and tyrany?

Also, how bad would the damage be that regaining the trust of the rest of Ponyville would have been quite an uphill battle for the real Mane 6, providing nopony learns about Chrysalis and the Mean 6.

[Glimmy 29]

I don't think the reputation will be hurt and even if it is it's only for a short time.

The moment they get to know that they were the fake ones the reputation is back on but yeah the trust and belief can get a bit shattered. No wonder

[TransitPony 239]

The impact will only be short but traumatizing. As the Mane Six is well known across town, it would take a while for the citizens to see that they are not the bad ponies as perceived to be. 

[BrawnyCharger 513]

I imagine Evil Applejack would have told Big Mac a particularly terrible lie about Sugar Belle cheating on him with Feather Bangs. I can also picture her telling Sugar Belle that Big Mac is cheating on him with Cheerilee. That might cause some real damage.

Evil Pinkie Pie would be absolutely bored at the family rock farm and also say that Maud and her sisters are boring.