Have seen this one shared widely by TRAs. I don't know if there is a better debunking of it by someone qualified in this area, but I've read it a couple times and was able to see glaring holes in its conclusions.
I'm having to do this from memory (and my memory is bad) as it seems the study is no longer accessible for free. So my best recollection is...
It's a small study of bathrooms in 1 US state ( Massachusetts)
It measures rates of police call outs to public bathrooms before and after trans inclusive bathroom policies were introduced.
The authors argue that because crimes didn't surge, trans people posed no additional threat.
The things I noticed were (again apologies if I gave misremembered anything here)...
The crime rates did actually go up then reduced to about the same level as before.
Only police call outs were recorded. Any lower level incident wasn't tracked.
Because males were now allowed in women's spaces, it stands to reason that fewer incidents would be reported to the police. The voyeur in the changing room now has every right to be there, so why call the police? Therefore you would have expected the police call out rate to go down.
A change of bathroom policy is being conflated with a situation where TW were overnight added to women's bathrooms. As we know many TW use women's spaces regardless of policy (and some don't) so pointing to a lack of crime surge doesn't show anything significant because we don't actually know how many more TW used women's spaces after the rule change.
Apologies for derailment here.