As a system that does hop we will be working on a vblog that will probably eventually also have an essay about developing security systems/ "layers" for hoppers at some point. Because yeah hoppers are very prone to cultist-style abuse.

We view Canon call groups as "a great way to meet people who get your experience but very unlikely to find your
'exact bookend'".

I can't corroborate or find a citation, BUT I suspect that plurals grabbed the "doubles" term from the fictionkin community because doubles was often a matter of contention back when "fictionkin" was still called "otakukin" (and honestly still can be in some fictionkin circles).