We do do this. Take them to the HT, at least, but we don't suspend for it.
The bottom line is that (some of) the children don't care about being taken to the HT. Some don't care about suspensions. They come back and do it all over again.
There's nothing the HT can say or do that will change the behaviour.
Some of the children experience such shit homelives and are the products of such poor parenting that There's nothing we can do or say that will even touch them.
Not only that but we are seeing many children come through primary with trauma behaviours (from parenting) from parents who are, themselves, exhibiting trauma behaviours - especially poor emotional regulation. It's the whole 'children learn what they live' thing.
On the lower end of the social spectrum, there are a lot of families who see schools as the enemy; part of the establishment. And they will fight us every step of the way on everything.
At the other end, we are only teachers. People who weren't good enough at our chosen subjects to make it as a professional in that field. The those who can, do; those who can't, teach mentality. They seek to micromanage us.
Those attitudes are reflected in their children.
Then there are people who have made a lot of money in trades. People who outearn teachers by miles in skilled work they entered because they left school without meaningful qualifications. I have friends in this group so no issue with that. But, for some the attitude is that school is a waste of time. They did better than the teachers in life and the level of disrespect in some is off the scale. They literally talk to you like you're shit. In front of the children. And brag about it. I know that because sometimes the children will repeat what they say.
Of course, there are very many incredibly supportive parents across all groups but there are those who take pride in their children 'taking no shit' from their teachers.
And you see all of this reflected in MN threads.
Some of the children will come in and tell us they're going to get us sacked. That their parents are going to complain to ofsted and we'll get sacked. Not for serious transgressions but because things like keeping them in at break as a sanction or removing them from a classroom for persistent disruptive behaviour contravenes their rights according to the UN Rights of the Child (the right to have friends/get exercise and the right to an education respectively) And they can quote the relevant article numbers at you.