Mrs. Tweedy is doing a service to humanity, even if she sees other humans just as a source of money. And expecting all humans to stop eating chicken altogether is unrealistic, which makes her worst crime abusing both of her husbands. Ciccio and Guido tried to kill Luca and Alberto (which should make them Villainous Benchmarks) and Massimo is implied to have killed a lot of sea monsters before his redemption (which would make him Inconsistently Heinous).
For those villains who have no allies, you could just leave the section empty, so if that's a reason for not adding them, neutral characters shouldn't have it either because there might be very minor characters who don't have any allies or enemies or any known relatives. And having a poor relationship doesn't make characters not family (they can disown each other but they're still biologically or in-law related); otherwise Scar should be removed from Simba's family section, Frollo from Quasimodo's, Lady Tremaine from Cinderella's... Plus, it helps understand why the villains are in the "Friend of a Hero" and "Related to Hero" categories (although if the character is on-and-off or switches sides it could be both a hero and a villain).
Heroes Wiki and Neutral Characters Wiki have them, so what's the point of not having them in this wiki too, specially since a relationships section (an idea which seems to be taken from Marvel Cinematic Universe Wiki) was added to some articles?
One more thing, while there have been edit wars about who's the tertiary antagonist, that's no reason to straight up ban the term. Some works have a clear tertiary antagonist.
By deleting posts for that reason you're sending the message that only the admins' opinion counts, and that there's no freedom of expression.
Keep the "no plagiarism" rule if you want, but let others say their opinion on that.
Terry from Soul is a villain. Doing your job doesn't justify an attempted murder. The Great Beyond is where people who die go, so sending someone there is murder. Terry tries to kill Joe Gardner for cheating death. So why is the Dahaka from Prince of Persia a villain but Terry isn't?
The main antagonist of Sing is the SFJ Bank. It's been a threat to Buster from the beginning of the movie, while the bears were just enemies of Mike and not a threat to Buster until near the end of the movie. I think their claim to be the main antagonists is based on them being villains unlike the SFJ Bank, similar to putting Scroop as the secondary, later true main antagonist (though I think that one was actually because people thought Silver's redemption was earlier than it actually was).
Jackson Storm is a villain, not just a cheating jerk. Cheating is villainous if it involves assault. The only difference between him and Chick Hicks is that, while the latter won all his races this way, the former only resorted to it when he was losing to Cruz Ramirez.
Antagonist ≠ Villain, but Murderer = Villain. If murder is part of your job, you're a villain. She tries to bring Joe back to the Great Beyond (a.k.a. kill) just because he escaped to Earth (a.k.a. resurrected), to keep the number of souls which enter the Great Beyond every day exactly the same (a.k.a. keep the mortality rate in the world exactly the same number every day).According to her official description, Each Jerry does their best to tolerate Terry, whose obsession with The Count can be burdensome—especially when it's off. It's likely that no one told her the count should never be off. If she's not a villain, the Fates aren't either, because they're also "just doing their job". They're literally the reason why no one except Hercules is immortal. They could choose to never cut threads, yet they keep doing it. The same with Time from Alice through the Looking Glass.
That happened to me with a few of the articles about Zip & Zap villains. Someone added the one-line article template to Falconetti's father's page, which had more than one line (and I don't mean one sentence which occupied more than one line), when I've seen other pages with nearly the same length remain. Also, I didn't create a page for Piojo just because of his bullying, but because he was in Falconetti's schemes. I also created PeloCohete's page because, even though he wasn't in Falconetti's team for the search of diamonds, he enforced his Trunchbull-like rules, and I've seen pages for villains who only had "aiding and abetting" as their crime (like some of Lotso's minions). It seems to me that if the media isn't well known enough, someone puts "Nothing villainous described there" and the admins delete the page without reading it.