The definition of paraphilia is "a condition characterized by abnormal sexual desires, typically involving extreme or dangerous activities.", which can inclde pedophilia.
The term is real, it's even used in scientific literature. The term possibly even predates 4chan, or maybe it's just a success on 4chan's part, successfully laundering a term into scientific discourse? It's hard to find too much solid evidence on the origin of the term. 4chan did seriously signal boost it with the whole "MAP Pride" thing though.
Anti-unnecessary terms. Changing "child porn" (or CP) to "CSAM" is a ridiculous, confusing, and unnecessary thing. And it takes effort away from meaningful action.
Making of a big deal about it is what takes away effort from meaningful action. Nobody is taking time out of their day over this issue but you. This is silly.
Its some bullshit cooked up by internet trolls, and accepted and used by right wing propagandists, as the latest thing to use to try and paint gay people as pedophiles.
When, historically, we know the actual pedophiles are the ones falsely claiming gays are the danger to children.
It's inclusive of both pedophiles and hebephiles - that is, prepubescent vs. pubescent children.
So, it's got that going for it. Treating them both the same.
Unfortunately, it's also used to obfuscate the fact that a MAP is a pedophile/hebephile. Which is bad.
There are people who have messed up brains, who are attracted to kids, and hate themselves for it. They seek help (usually through lots of chemical treatments), and use the term MAP to separate themselves from the pedos. Unfortunately, pedos use the term MAP to hide the fact they're pedos, so... 🤷
To be fair, it is not politically correct language, actually it's language that's commonly frowned upon in all circles. But basically as long as the LGBT rights movements have existed with any level of mainstream visibility in America, there have been organizations like NAMBLA and the like that have been trying to piggyback off of them...
And it pretty much ends the same way, with the pedophiles being shown the door.
Incidentally this is what the early South Park episode about the National Association of Marlon Brando Look Alikes getting mad at NAMBLA (the irl NAtional Man Boy Love Association) for stealing their acronym is poking fun at.