kind of, yeah? because a fourth wall is sort of explicitly for goofy shenanigans and, tbh, i've never really liked them. yeah, you can opt out which is easy enough to do, but if someone from your canon comes in and is a copy/later version, that can cause a lot of in game crap that can have long lasting effects. same with anyone potentially apping in and deciding not to or getting rejected. personally, i prefer games that have test drives that allow for the cr between the characters to be carried on in game if they both agree to it, but it's not assumed it will.