You can’t operate a service like this legally, you have to do tactics like the archive.is guy. They won’t just let you scrape and rehost their site.

I think the main point here is that legality should not be of issue here.

These are other people's words. Not Elon's property.

If he wants to enforce and defend his terms of service of his website and attack whoever's avoiding them to scrape it or whatever he's worried about ... he can do that.