I find it to be a few things, more recently the media doesn't help at all, and also I notice it seems to be a generational thing, older folks are less accepting of reptiles because that what they were taught as kids and its you against their beliefs they've known forever.
Im lucky at get to work with people who are 20 years old - 60 years old all the time, so I get alot of perspective from alot of different people, btw im 22 years old myself. So when lunch time talk comes up and someone asks what do I do to keep busy, I tell em computers, cars, and I raise snakes. younger people normally go "hey cool, I had a friend that has a *insert said reptile here* or they might own 1 themselves.
older folks tho look at you and repeat things they see on tv, is it a python? they get big and it killed a girl in Florida, are the poisonous? why do you keep them? ect..... of course its not true for everyone, but its a trend. then I have to play educational man and answer all the standard questions and my normal speech I give. after all that it seems to change peoples mind about it.
heck one guy even had to drop of something over my house and brought his little 6 year old daughter with him so she could come see the snakes. and he was one of those "you raise snakes...whats wrong with you?" guys at first lol.
so I think the stereotype can be broken, but also If you've gone to a reptile show, half the people I would say are "normal" looking people, the other half.... you know where the stereotype comes from. im not judging, just how it is.