Jeeze, that's hilarious(ly) bad.

Even though the creator of postmill is super against free speech and is for heavy handed censorship herself, I'll give her props for not trying to hardcode or even make a filter a default option on postmill.

The feature exists and is literally called, "censorship" on postmill with the discription:

This tool lets you ban phrases of text from being posted. It can be used to prevent spam, or to suppress dissent.

Though I always thought it was tounge in cheek humor and not serious...