I'd look to how metafandom newsletters on LJ/DW were run in the past. Some would get permission before linking to a public blog post. others would drop a heads up. And others would not ask, but would remove a link if the post blew up. And a few would just link. keep in mind that many fandom "news" newsletters/roundup had meta links and very few of those newsletters asked permission beforehand or would remove links after the fact.
As for Fanlore linking to old meta posts that were originally linked in previous metafandom newsletters ..the idea of functional privacy is not a new one. So I don't think there was a universal or even widespread expectation of functional privacy in the "good old LJ days". There was a diversity of opinion as to whether anyone could link to someone else's blog -- either from our own personal journals or from a newsletter. I know I had a few meta posts of my own on the very same topic that ended up being linked by several metafandom newsletters (not always a comfortable experience).
So I think your linking guidelines are fine:
"My own answers are currently along the lines of: community posts are probably fine to link because they were posted widely to begin with; Fanlore pages made through explicit permission of OP is best, but for certain historical meta it's okay to link anyway; linking to Fanlore to provide further context is fine; no way to ask for permission means no link; if the OP has completely disappeared from fandom and/or online, it's fine to link their stuff."
no subject
As for Fanlore linking to old meta posts that were originally linked in previous metafandom newsletters ..the idea of functional privacy is not a new one. So I don't think there was a universal or even widespread expectation of functional privacy in the "good old LJ days". There was a diversity of opinion as to whether anyone could link to someone else's blog -- either from our own personal journals or from a newsletter. I know I had a few meta posts of my own on the very same topic that ended up being linked by several metafandom newsletters (not always a comfortable experience).
So I think your linking guidelines are fine:
"My own answers are currently along the lines of: community posts are probably fine to link because they were posted widely to begin with; Fanlore pages made through explicit permission of OP is best, but for certain historical meta it's okay to link anyway; linking to Fanlore to provide further context is fine; no way to ask for permission means no link; if the OP has completely disappeared from fandom and/or online, it's fine to link their stuff."