What can the students do?
There's hardly any point in them trying to do anything official. They may as well just make their point in other ways.
I would say I was a fairly well behaved child at a school with no particular behaviour problems. Maybe a bit of smoking on the roof and drinking all the sherry at the parents evening. We used to tease the matron about her hairy chin. 
There's no way we wouldn't have reacted to that. Probably nothing subtle. Just humming or singing "Do your boobs hang low ....🎶"
whenever we saw the appendages approaching.
DH and his schoolmates had some inventive ways of annoying teachers. In a school with very old buildings, they somehow discovered that by quietly jiggling their heels on the floor, with half the class joining in, getting a rhythm going, it made the huge old windows rattle and it drove the teacher nuts.
We once looked at a Steiner school for DD and I noticed the pupils had prepared for open day by covering all the loos with cling film. Seems like a fair way of making a point about toilet usage.
I can't believe those children would be so well behaved that they would be respectful to that teacher. Possibly tricky if it is an important exam subject but woodwork - just have fun kids. In its way it would be more effective. They can't officially complain. Can the teacher officially punish the entire class? All the classes? I would honestly like to go back to school to take that on.