Who's claiming 4B that isn't? I am sorry I didn't read the whole thread so might've missed it but so far the only person I found who may not be 4B wasn't insisting she was 4B. It seemed she just didn't know and immediately accepted she might be a 3. So I dunno where these people y'all seeing who are insisting they are 4B when they aren't are. I think it's that definition of "no definition" that throws people off. Or the assumption that 4B hair is frizzy so the minute a 3C/4A person has dry frizzy hair she assumes she's 4B. IMO 4A/B and 4B are so similar that it can be easy to mistake them. Likewise 4A and 4A/B are so similar that again the confusion can be there. So if a 4A/B person chooses to call herself 4A or 4B, I don't think it's that big of a deal. *shrug*
I see very few people claiming something that is so far and away from what their type is/might be. I don't see these people, either? Typing is hard! Mostly because the definitions out there don't make any sense. Look at this thread! Yeah, I've seen it, but very very rarely.