Instagram confirmed that the eggplant was blocked because it violated their community guidelines, Buzzfeed reported.
YouTube said the ad did not violate its community guidelines or advertising policies.
Community guidelines, though, can be difficult to enforce consistently across the world.
The company said it "age-restricted" the image in accord with its own community guidelines.
Well-drafted community guidelines give platforms personality (and reassure nervous parents).
Instagram's community guidelines explain that images of post-mastectomy scarring and women actively breastfeeding are allowed.
This wouldn't require any alteration of Twitter's community guidelines on what is and isn't acceptable, simply more proactive implementation.
"Promoting the sale of, or selling marijuana and other drugs is against our community guidelines," says an Instagram spokesperson.
The comment outing "Bluecloud" was removed because it is against the Guardian's community guidelines to identify any poster.
A "trusted flagger" program allows groups such as the Anti-Defamation League and the Institute for Strategic Dialogue to report videos that violate community guidelines.
We are also changing the process for new commenters, so that they see our community guidelines and are welcomed to the Guardian's commenting community.
