Something I think about a lot is how to prevent people from messing with the IndieWeb. It hasn’t been a huge concern as of yet because thankfully we can trust everyone in the community so far. But if we were to go 10x in size right now, how do we stop people from posting something, editing it and making it seem as if the original post changed? We give people a lot of trust into the content they publish.
I know any solution towards this would have to be backwards-compatible with how we do things now and shouldn’t impede progress but I do think that I’ll be working very hard on making this a required function for my readers. And I think I have an idea for one (as well as a way to make this work for everyone without causing too much headache - it’s a bit like DKIM but with less moving parts).