Why is the not pony related tag forbidden here but on Furbooru it allows you to use not furry?

Satu Putra
Artist -

gumibar
not pony related
This tag exists, even if it is forbidden. But on Furbooru, not furry content is allowed here as long as it’s tagged with the not furry tag.
Why does this tag exist when it’s forbidden? Did it accidentally exist? Or was it permitted at first but then became forbidden?
Ciaran
ラ・ゼッタ - For supporting the site
Pixel Perfection - I still call her Lightning Bolt
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Shimmering Smile - Celebrated the 10th anniversary of Equestria Girls!
Lunar Guardian - Earned a place among the ranks of the most loyal New Lunar Republic soldiers (April Fools 2023).
Crystal Roseluck - Had their OC in the 2023 Derpibooru Collab.
Flower Trio - Helped others get their OC into the 2023 Derpibooru Collab.
A Lovely Nightmare Night - Celebrated the 12th anniversary of MLP:FIM!
Princess of Love - Extra special version for those who participated in the Canterlot Wedding 10th anniversary event by contributing art.
Tree of Harmony - Drew someone's OC for the 2022 Community Collab

Senior Moderator
友情は魔法だ
Did you even read the tags’ descriptions?
PS: if you want to ask about Furbooru, you should ask on Furbooru.
PPS: this is not how you appeal your upload being deleted.
Background Pony #25A5
Why does this tag exist when it’s forbidden?
  1. A very few images might be permitted on the site, exceptions to Rule #3, due to historical/community significance, but are not pony related and need a tag to identify them
  2. It can be useful to find images that need Rule #3 reports made for them, if other people failed to do that themselves and improperly used the tag instead (and/or they could not report them at that time due to already hitting the limit of open reports on their account)
  3. People misuse the tag on things they don’t understand/don’t like, and nobody else notices or reports the tag misuse to moderators, so it stays, even though it’s improperly used
Furbooru
Sir, this is a Wendy’s
Kincyr
Pixel Perfection - Hot Pockets Spotted
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Non-Fungible Trixie -
Wallet After Summer Sale -
Not a Llama - Happy April Fools Day!

Non-Fudgsicle Token
for a tag that shouldn’t be used, not pony related sure has quite a lot of use. paradoxily, there was even some overlap with barely pony related
Interested in advertising on Derpibooru? Click here for information!
Techy Cutie Pony Collection!

Help fund the $15 daily operational cost of Derpibooru - support us financially!

Syntax quick reference: **bold** *italic* ||hide text|| `code` __underline__ ~~strike~~ ^sup^ %sub%

Detailed syntax guide