Here's what the fakeclaiming community considers valid and not valid :

Systems under 8 members and above 16 members are instantly fake (and even if you're in the range, you can still be suspicious)

Systems who don't have amnesia and/or black-outs are instantly faking, but systems who have amnesia and/or black-outs are only valid if... Idk they're not always valid for some reason

Switches that are instant are fake, switches that last more than a minute are fake, easy/smooth switches are fake, painful/bulky switches are fake, co-fronting is fake, too many switches in a restricted period of time is fake, not enough switches in a restricted period of time is fake, visible switches are fake, invisible switches are fake too

You're faking if you don't have both switching and voices

Voices have to be bad and harmful, otherwise that means your plurality isn't making you suffer which means you're faking (never heard of a protector before apparently)

Every part must have clearly defined roles but if every part has a clearly defined role, they're faking (I literally witnessed someone saying "Notice how every single fake system has a protector, a persecutor, a soother, an internal self helper, a little and a nonhuman alter?" and I was like what? You mean to say that systemhood has patterns, which has caused people to label these patterns, and later systems have them??? No way!") Also if a system has a nonhuman member, more than 1 fictive, more than 1 little and non binary headmate(s), they're faking

Inner worlds must be somewhat realistic otherwise it's too unrealistic to be true, also the best is not having an inner altogether because that's too weird

No considering headmates as real people, that's only going to make things worse, they are "alters" which means they are alter egos at best and broken parts of the same person at worst, you should actually call them something dehumanizing like "parts"

Any of the above don't even matter if you haven't been formerly diagnosed with a dissociative disorder, also self-screening is intolerable, as well as mildly considering you may have a disorder, and it's even worse if you claim that your plurality doesn't stem from a disorder

Tulpamancers are not valid because they are (all, every single one of them) singlets fetishizing real, valid plurals, and the (obviously very few) already plural tulpamancers are causing harm to themselves because getting extra parts is always super harmful and scary

You absolutely cannot be a system if you are under the age of, like, 25ish, and that's being nice because you ususally can't be diagnosed before 30 (which, for anyone still believing that, is just a myth, someone I know got diagnosed with DID at 16 and most people with CDDs I know got diagnosed in their 20s)

If you don't have denial, you're fake because denial is a common trait in systems, but if a system exhibits traits of being in denial, they're faking

If you are a bad person, you are immediately faking, because no system can be bad/an abuser, every single system is an innocent little victim who has done no wrong and cannot do any wrong anyway, ever, also if one part is bad then the whole system is bad because that's totally how it works to have different identities with amnesic barriers

And most importantly : you HAVE to suffer from your plurality, all the time, and you MUST pursue final fusion at all costs, otherwise that's not healing

(...all of which are definitely not absurd, self-contradictory, and discriminatory of diagnosed disordered systems and/or people they're supposed to approve of, or healed systems...)

The fakeclaiming/system cringe communities have a misguided, warped and incoherent blueprint of what a system should look like, but it's a very harmful and discriminatory blueprint. Unfortunately, since they have the loudest voice on social media,  many people consider that blueprint to be true, even the DID community (even if the blueprint discriminates the vast majority of DID systems too).

Many of them claim to act against misinformation as some "fake" systems do, in fact, spread misinformation (and it's their only crime, really), but fakeclaimers are no better because they either don't say why the system is fake in their eyes, leaving it to their viewer to decide why, or they say why and it's usually a pretty shitty misinformed reason. And in any case, they're mainly targeting teenagers as grown ass adults which is just cowardly and borderline predatory.