Exactly this. ^ Anyone who derides and berates people for putting up Jublilee bunting or wearing Jubilee hats and crowns during the fucking JUBILEE, is a mean spirited, boring, sour faced oik. Don't join in if you don't want, but shove your bile and derision where the sun don't shine, because none of the people celebrating it and embracing it, give a shiny shit about your nasty toxic views.
This is mumsnet though, and there were bound to be some haters full of bile. They love it. They rush to these threads with their toxic little fingers bashing away their hateful views on the keyboard. Same as twitter. Don't like the Royals or the Jubilee, but just HAVE to comment on it, and rush to anything written about it, just so everyone knows how much they hate it and how pathetic they think people joining in are... Like the people joining in are meant to care about their wanky opinions!!! 😂
As I said, no-one gives a shit about your views, so crack on! But you're wasting your time, because you are spoiling NO-ONE's fun. Everyone will be having a ball while you sit there stewing in your own bile. Probably bitter coz you haven't been invited to a Jubilee party! 
In real life, almost everyone I know is joining in, with just 3 or 4 who are not bothered about it. NOBODY is being nasty and spiteful in real life. Only online.