It depends on the type of exposure.. People's reaction to wearing diapers or acting like a baby doesn't really mature passed the preschool playground level. For some reason in my life I have come to find that diapers for most people are one of the touchiest/most embarrassing subjects in any conversation and it's one of the only things to reduce any level of maturity right back down to grade school. Sure it's "hip" today to be kind and supportive about people's conditions, but that seems to only goes so far.
Also, the fetish itself is commonly related to a lot of very evil, disgusting mental sicknesses by people who have no idea what they are talking about. And to the others it's just confusing. I think if we got more of exposure we normally get, it wouldn't necessarily do any good to the community or gain too many members, even though I'm proud of who I am and I love the community. Sure, there might be a spark in a very very small group of people who may try i out, but 1/100000 times if you have the fetish you KNOW. I mean we all found our way to this site (or all of the others) alone right? Something was naturally driving us here.
But with all of that said, with the way our world works, I'm sure if Justin Bieber, Lady Gaga, Thom Yorke, Chris Martin, Oprah, Jimmy Fallon, Howard Stern, Taylor Swift, and a bunch of other cult leader celebrities went into the media preaching that acting like a baby and wearing diapers was cool, hip, healthy, and great, I'm sure that the ABUniverse and XP medical sites would crash and basically the whole adult diaper industries would sky rocket times a zillion.