Fascinating (if sometimes confusing!) thread.
I agree that some of these are just arguing about semantics, though. Yes, what is commonly known as 'road tax' may not be technically called that officially, but as it's a tax which has to be paid (or applied for/registered, even if the cost is £0) in order to be allowed to use your vehicle on the public roads, it's not really something to be dismissed as woeful ignorance. There was a time when all official documents would have referred to 'motor vehicles', but now even the DVLA uses the informal 'car' in most places.
Unemployment benefits were never officially called 'the dole', but at one time, it was a universally-understood (if possibly not very kind) informal term for the concept of receiving benefits instead of earnings from a job.
Also, as PP said, whilst social workers don't personally 'take' your children from you, they will often be responsible for raising the alarm on concerning cases, which may result in your children being taken from you. Yes, this will be ordered by a court, but the members of the court won't be the ones initially visiting your house and spotting the red flags.
You may as well quibble if somebody is described as 'dying from falling off a steep cliff', just because it's the landing which will actually kill them. People still talk about the old castles that were 'built by King/Queen X', even though they had poor/common people who actually did all of the building work.