the de facto threshold is whatever allows them to get consensus and have an
admin make the
necessary changes and not be reverted
You can see the consensus in
http://it.wikipedia.org/wiki/Wikipedia:Bar/Discussioni/Comma_29_e_Wikipedia
I know, it's in italian and google translate sucks, but you can see the
"opposite" "favorable" templates. Italian wiki community (not only
italian
inhabitants) are compact