I'm with you there on teapots, what a ludicrous idea. I shared a teapot of, well, tea last week and it's such a strange idea to me. I'd rather just put my teabag into the mug, add the water and let it brew for as long as I desire.
On a related note, one for the list has to be:
People adding milk to tea when you specifically ask for black tea. If you're not sure if I want milk, just ask before automatically doing it. I don't take milk, plant based or not, in my tea as it ruins the experience and taste. Same applies to coffee, I used to love milk in my coffee but my tastes changed and now I can't stand it. Doesn't matter what milk it is, whether it's hot or not, whatever. My view is tea and coffee work best on their own with nothing added to them.
I'd also ban their disapproval at having to make the drink again after they foolishly added milk to it without asking. I had it happen 3 times in the space of a month, all in the east of England too. Coincidence, no doubt, but still!
I've no doubt mentioned it before, but those cheap teabags Greggs use that break open after just a few minutes in the water need banning. I appreciate Greggs selling tea for cheap prices, but I don't appreciate a mouthful of bitter tea leaves!