I teach in secondary, but I've never watched any of the "Educating" series... feels a bit too much like work to me!
The school I currently work in is a lot like gingee describes: asking permission to remove blazers, standing up for the head, holding doors/stepping aside for staff. This, in my opinion, is good for children. It teaches them early on how to respond to the inevitability of rules and the presence of an authority which is not their parents in the "real world". The school is in an area of very low social mobility. The school seems happy and friendly as a result of these boundaries, which mean that there is opportunity for mutual respect from staff for students as well. I would indulge in a bit of "bantah" with my lower set boys and my sixth form, but only in the interest of keeping a good relationship with my pupils, since you can't bark at them all the time. However, I make it clear to them (as I've reminded one Year 10 already this year), I am their teacher, NOT their "mate", and have no interest in being so.
This is far better than the last school I worked in, where the level of "cheek" was ridiculous from some pupils towards staff. The kids didn't know how to move appropriately through a corridor (I would frequently have books/belongings knocked out of my hands), and swearing at staff was a daily behavioural issue. The SLT were at fault here, I believe, for not employing a stricter behaviour regime (mobile phones in class not confiscated, for example, so pupils were often using camera phones or social media during lessons- many problems with safeguarding here...), and also for indulging in the outrageous demands of the parents, who had a similar lack of respect for the school. Funnily enough, this was in a far more middle class area, with higher aspirations and wealthier parents.
Personally, I have found that children are, comparatively, more entitled (a Mumsnet fave!) "these days", but usually because they come from more entitled families, who believe their child/they can do no wrong, and have issues with acceptance of authority... the, "Peter is a spirited child" sort... I have sometimes received info on my new pupils which states, "Does not like authority", or, "Finds female authority difficult to accept", or, "Dad will only communicate with male staff". Well, sucks to be them, they'll have to put up and get used to it, or real life is going to come as something of a mighty shock down the line, and I'll have failed miserably in my wider responsibility to a pupil if I start bending to such whims as, "Rohan doesn't like to be told what to do."