Yw
I hope the wiki doesnt see the disclaimers as "poisoning" the article. It's just an accurate reflection of cc by-sa, and I'm certain it has everything for full transparency: title, source (site name), a link to the license, and history (including a local copy). Reflects my personality of discontentment at the stringent attribution requirements too, even if I understand why they exist. :P Over 350 articles on the Mario Wiki on Fandom already have an SMW disclaimer (accompanied by imported history).
I can think of cases where if NIWA wikis followed the rules, they'd have those, but they want to promote an "all original" image. the Donkey Kong coverage merged from dkwiki.com into mariowiki.com doesn't have the disclaimers like it should. Jiggywikki is lacking some of the Rare.fandom.com disclaimers that it needs because some of the text was from there.
Then again I believe i did see Wikipedia disclaimers on PokeWiki and WikiDex before. PokeWiki has one on their Nintendo DS article.