I hope people are going to resist joining in with pointless insults, however justifiable that might seem. I sometimes the Cat does't have a personal button enabling us to filter out individual posters. Not censorship, they'd still be able to carry on to anyone who likes that kind of stuff.
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If there was the political will to take over vacant houses and use them to house people in this emergency, it could be done. Crown prerogative is remarkably wide.

The government, with the backing of parliament, would act. If owners chose to challenge this through the legal system, they could seek to do so. Even if that proved successful, which is very far from certain, legal efforts to evict the Grenfull Tower survivors would be likely to take considerable time. Meanwhile efforts to provide a more permanent solution would be going ahead, and the people involved would be living in ressonable accommodation locally.