I think it's funny that Rh- is even a thing. I never would have known if it weren't for the internet. I'm Rh- and so are my kids (much to my husband's chagrin since he's O+ and couldn't donate blood to any of them or me).

I know from going through 3 pregnancies that the regular protocol is for a woman to receive 2 shots during pregnancies if she's preg with a baby that might be Rh+ to reduce the chance of her body having a reaction but generally the blood doesn't mix and it isn't a problem. She gets one shot partway through the pregnancy and one after the baby is born. I never had to have the 2nd shot since my babies were neg like me. The reason for the 2nd shot is to reduce the risk of the mother developing an immune response to the Rh+ which could prevent her from carrying Rh+ babies in the future.

Other than that it only ever seems to play into blood typing for blood or organ donation. There are a lot of weird things people have said about the blood type but most Rh- people are pretty much just like anybody else.