I don't know know/can't find the current topic, so I'll just post my reply to the first post. =D
I have never head of infantilisim until now, but reading up on it, it doesn't seem like it bothers me unless said infantilist takes it to an extreme. I believe that people judge infantilists negativily because today's society is to scared to look at or associate with something that does not fit that particular persons definition of 'normal.' They see someone different, so they automatically think along the lines of, "Oh, that freak! We've gotta' bash him." They just don't admit that's what they're thinking.