Bad answers can't be removed from skeptics, because of policies says mod shouldn't do it. And here on skeptics we don't have any high rep users not being mods.
Lets make a metaphor for skeptics, as a country. The high rep users are the rich and noble, and the low rep users are peasants. The Mods are the political party ruling the country.
The country have its political party running the country, but the party tries to interfere as little as possible, and only acts as a police if something really goes awry, or if someone is doing something inappropriate.
For morale, interference and guidance of the country, it's for the country itself to guide its members. They want the country members to vote for who is elected into the party, and which things the peasants may sell in the town squares.
The party have decided to not touch petty details like that, the country should govern itself. The party have too much power, and it could lead to potential abuse.
The problem for the little country of Skeptics is that it adopted the policy and ways of a much bigger country, and in that country there is so many people living that they have a thriving nobility on top of having a large party ruling the country.
Most people being voted in to the party, are the rich and noble, since everyone knows them, and they are rich so they must know what they are doing.
In a large country like Skeptic's neighbor Stack Overflow, that is not a problem, because the pool of nobility is large, and even without some of them there is still many enough left to handle setting policies, and guiding the country on what to sell in its market squares.
In the small country of skeptics even if you're selling Rotten Skewered Rats, it's okay, because as long as you uphold how you market your Rotten Skewered Rats, make sure to show what the Rotten Skewered Rats contains the Party can't intervene, since it's of their policy to let the community decide what is sold or not.
The problem for Skeptics is that there simply is no one that there is no one there to say no to Rotten Skewered Rats.
The peasants are not allowed to decide such matters, even if some peasants protest, they are not allowed to decide that themself.
There is no Nobility in skeptics, all the nobility have joined the Party instead.
The Party have decided it should not intervene, and even if the party agrees no one want to eat Rotten Skewered Rats, and that it's despicable something like that is sold, they strictly follow the policy set by the large country of Stack Overflow, that works wonders there, and decide to not intervene.
To this day the small country of Skeptics have to stand by being the country that sells Rotten Skewered Rat, which no one is proud of, but no one is allowed to do anything about.
Even if it's against the policy of Stack Overflow for the mods to touch down-voted answers, Skeptics can't at the moment follow that policy since it simply is too small, and doesn't have high rep users to do that.
If an answer have -5 or less as score, it should be okay for the mods to delete it, but it's still up to individual mods to do it. The community have called out the answer to being bad, even though they get personally penalized for doing so.
It should thus be the request of the community to remove such an answer, and the part.. err I mean the mods, should then be free to do so.