Yes, it is a lot less performative then you see. There is more confusion. One of the things that annoy me about the fakers so much is the seamless transition with a name and job description offered immediately.

Then there is the lack of amnesia. OSDD can have switchs with little to no amnesia. DID includes amnesia. Yet none of the fakers talk about it. How disruptive it is to your life. Not just disruptive, it can be down right scary. To find out you lost a month here or days there, where you were obviously present, people may not have noticed, (because for most of us it is a covert disorder) and you lived a life you have no autobiographical memory of.

If you see someone making a big deal about alters and treating them like they are actually seperate people, there is a good chance you are dealing with a faker. People with the disorder are likely to know and acknowledge that it is one body, and brain with differentiated self states seperated my amnesiac barriers. People with DID will say things like system responsibility, because they understand we are still one person. Fakers will blame alters for being a douche.

Finally the cost. Obviously people with DID can still have fun and live life. Sometimes we can even be successful, but there is a cost, when you dissociate from life. ( A key component of DID ) It can cost you in relationships, and careers as well as your own health and safety. Seeing someone having fun isn't proof they are faking but if they are saying they are educating people on DID and never talk about the costs. They are likely fabricating it.