User blog comment:TheShinyLucarioMaster/Do FANDOM Users prevent you from adopting the wiki?/@comment-27481640-20180216154755

Actually, if they don't respond, that technically means they're saying yes - the interpretation is that they aren't objecting to your adoption request.

However, the kicker is that, if it's one user, a message wall post is good but they have to have time to a week before your adoption request was viewed. But otherwise, as long as that user actually responds in favor of you or not respond at all, you're good to be eligible in a week.