"Monster Liberty": That's how the otherwise excellent closed-captioning service in the auditorium at Pennridge High School interpreted "Moms for Liberty," while one of several dozen citizens who had waited in line to lambast the group spoke at the podium. A chuckle rose up among the parents in the crowded school board meeting, held on a late August evening after the first day of classes for the Pennridge School District in suburban Bucks County, Pennsylvania. "Fair enough," one mother whispered to another.
Wikipedia has a more specific definition in the first paragraph:
I think it's pretty hard to argue that labor unions can be astroturfing. It's not like they have a lot of wealthy donors who are secretly trying to push narratives to encourage workers organizing.
If the definition for astroturfing is:
You only have to show there is organized action to prove astroturfing is taking place. That is an extremely low bar. I think it is too low, in fact. What political organizations would not meet that standard?
The definition you provided from wikipedia is much better.
I don't know why I didn't look at wikipedia in the first place.