Liking Mutable Things
On most silos where people can't edit stuff they've posted, you're liking immutable things. On the #indieweb, however, where content owners have complete control over their content, you're liking things that are potentially mutable.
One way to mitigate the problems of liking mutable things (like I do with #converspace) might be to quote the thing you liked along with your like post (Update: Only text is quoted. Images and other media are still served from source).