I had to stop posting photos of me feeding my baby on FB (even when you couldn't see shit or only a tiny bit of skin) because I would ALWAYS get random creeps PMing me.
I'm also an admin in a pregnancy/birth group and I constantly have to block scody arseholes from trying to join. It gets depressing sometimes. I can only imagine what r/breastfeeding mods have to endure to keep the community safe.