It's not implausible, but it's certainly convenient, isn't it? It's about the only thing that would make others say "thou shall not pass" then go full guard dog when anyone questioned her roll or intentions.
You're veering toward
@Angry Canadian levels of conspiracy and lack of use of Occam's Razor.
The fact that it's convenient doesn't even factor in here; even if she wasn't literally in a psych hold, we know secondhand Fiona's internet got cut, she later got her hands on her smartphone and sperged out on her Reddit hugbox, and her parents took the smartphone away and gave her a flip phone instead. Those are as close to absolute facts as we're going to have.
All that changes is that she may not have been institutionalized/in the hospital's nutcase wing but rather grounded by her parents for a while.
The game of telephone is annoying as fuck, yeah, but that's what you get when people don't want to bite the bullet and read the whole megathread like
@GiBi . It was stated by Grant in the original thread that all he knew for sure was that Fiona's internet privileges were revoked and "her parents are aware".
And you would know why people were going full guard dog on Fiona if you read the megathread instead of sperging in it like
@Angry Canadian . Fiona was a red herring in a thread that was dedicated to "who the fuck is this Kelly Osborn/Bella trollsona and where does she fit in the Incest Saga" back when it was still a thread on Chris' board. Fiona and her family got doxed, people concluded nothing was there, everyone went back to digging at Bella.
If you want a Fiona thread that bad, why not make it yourself? I'm not sure she should be in the ILJ board or the CWC board, or how much milk you can get out of that, but no one's banned Fiona threads. Plus you'd probably finally purge whatever crawled up your ass about Fiona that you keep bringing her and defenders back up.