I think they are still farting. I occasionally fart at school. I don't go around advertising it though. It's completely possible to fart without anymore knowing it was you, if you use your body and especially your buttcheeks right. It's a relatively easy skill to master.

The key is to unevenly shift your weight (lift one side and slowly allow it out), if you are level with the seat it usually creates an airlock or whatever which will amplify the force and volume created the moment theres a pressure leak/change.

Also, before you go, lie down on your stomach and try to get yourself so your lower half is elevated the highest and relax while the gas floats to the top 😁 Better out than in before school because then your day will be ruined from stomach pain

There were many days I had to find an empty classroom or office to plank in to clear the air, err, my stomach

Here, some educational reading

“FART PROUDLY: Writings of Benjamin Franklin You Never Read in School”

https://www.drjkoch.org/Misc/Franklin.pdf

Modern, easy to read format: https://teachingamericanhistory.org/document/to-the-royal-academy-of-farting/

People used to when I was at school 15 years ago.

Unless done with perfect comedic timing farts are not considered to be socially acceptable. It's been a while since I was in school but I seem to recall I would usually just excuse myself to the bathroom or try to do it when no one was around. If nothing else I would just try to let it out silently and hope no one noticed.

Reading these comments.... I'd like to add to the discussion, that farting being 'unacceptable' is not a cultural universal, globally, and it's amusing to me how strongly some people think it is.

Need more beans.