I prefer people posting the original source, and I’ll just let LibRedirect (on desktop) or LibreTube (on mobile) switch the link to my preferred Piped instance. I don’t want to use random instances.
I feel like most people who feel strongly against YouTube will have it set up similarly to where you automatically get redirected when clicking a link anyways. You can always offer up a Piped link in the text box or the comments as an alternative.