A lot of diesel cars are clearly labelled 'diesel' somewhere near the filler cap so that you don't put in petrol by mistake, that's a good idea. I can never remember which fuel my wife's car uses, so it's good that there's a visual reminder that it's a diesel. If an organisation runs a large fleet of cars with lots of occasional users, I suppose it makes sense to label the petrol ones 'petrol' as well. That's all fine.
But I walked past a parked police car today and noticed that next to the filler cap, in one inch high letters was the word "UNLEADED".
FFS, can you even buy leaded petrol any more and if so, where? I thought you had to buy unleaded and chuck additives in.
(I didn't dare take a photo to prove it because some coppers don't take kindly to that sort of thing, and I was going to take the piss out of them anyway).
Nearly as stupid are all the vehicles with a sticker on the back saying "Limited to 70 mph". That's the maximum speed limit anyway, so nobody would reasonably expect them to drive any faster.