The administrator of the US Federal Aviation Administration (FAA), Steve Dickson, said that the "zero tolerance policy" towards unruly passengers should remain in force indefinitely, even if US President Joe Biden approves the revocation of the obligation to wear masks on board aircrafts. 

The White House had recently extended the expiration of this restrictive measure until April 18, 2022. Meanwhile, the head of Faa will resign at the end of this week. Currently, the Biden administration would be weighing between ending or further extending the requirement.

Even now there is an increasing amount of verbal and physical violence against flight attendants and airport operators, grappling with unruly passengers protesting against the mask requirement and other restrictions. In 2021 Faa received about 6000 complaints against unruly passengers (4200 due to masks) and this year there are already 1000 reported travelers. 

On the same subject see also the article published by AVIONEWS.