The future audience weighs heavily on me when I’m writing things to post to the Internet. I assume virtually everything I post to the Internet could eventually be read by anyone I know now or may know in the future. I am fortunate that I went through the most pronounced part of my angry, stupid new Internet teenager phase in a forum with less robust archiving than Usenet.
It should matter less to me but it’s hard to post something that says anything at all when all I can think of is how will this seem years from now to people I don’t even know yet.