So true. We worked like the dickens to beg, bribe, coerce, persuade, and if necessary shame parents to get involved in the PTA, take their turn doing Home Room duty, show up for parent/teacher conferences and attend the orientation sessions. And once we had all that going, the parents found out they could do that, it was rewarding and fun, and all the kids benefitted. We had booster clubs for the choir, the band, sports, the arts, debate club, etc. etc.etc. But that was decades ago when both teachers and parents took responsibility for the education of the kids.
Now it seems the less parental involvement there is in the schools here, the better they like it. It certainly is not encouraged and too freqently is resented or even rebuffed.
I don't know where you guys are at, but there's no shortage of booster clubs for all you put above and more in our high schools. I wrote last week on Veteran's Day of the project the school did for Soldiers' Angels. Parents donated all the materials to make over 4k luminarias put around the school. Bags, sand, electric lights, markers, and flags.
Now I will say that in high schools, parents in homerooms, lunch rooms, etc., are not wanted, by students or staff. They do come in for conferences with teachers, etc. That is the norm, as it was back when I was in school, when Chicago was a prairie. They certainly have their work cut out on getting the non-drivers from one thing to another, making sure homework is done, schlepping them around to college visits, hosting dinners before the next meets, games, concerts, debates, etc. They are instrumental in raising funds and helping with rallies, special events, and other ways to show support for the schools, teams, and clubs.
In truth, though I've never had the problem, since I've only worked secondary, parents generally are disruptive in schools if they are interacting with the kids. Honestly, I was a parent before being a teacher and volunteered for reading helper, clean up person, room mother, etc. I'm sure most parents are fine, but heh, you all know the one that will hear a child read or see their writing or notice a graded paper and tell others how 'smart' or 'behind' that child is. It causes no limits of pain for kids, parents, and the teachers. Worse case are very bad teachers that will let parents grade papers for them, they should be fired!