I like Don't Hate, Donate too, and think Alex is brilliant for setting it up. And it's had some media attention, though not a lot. But I think the street parties are a (rather traditional) way of expressing rejection of her policies. Her death's an opportunity to have that heard. Yes, people might object at the funeral but that's not until next week - the story is all over the place now. (Though tbh, I think I would struggle to be that rude at a funeral - I mean, I don't want to go to any of the parties, but I think I'm more put off by that, perhaps because there will presumably be some people who are actually bereaved at it, in among the ludicrous pomp.)
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