Lefty here. Caught shit for it pretty much until high school (graduated in 93). Had teachers actively try to force me to switch. Since my dad had trouble accepting me for anything (when he was sober, he told me he loved me all the time when he was really drunk), he also gave me a lot of shit for it. For example, my uncle had to teach me how to hold a bat, since my dad refused unless I took a righty stance. I throw right because of this. I also never learned to play guitar, even though both of my folks are accomplished players, because my dad refused to buy me a left handed guitar or even restring the right handed model that he bought me. He even went so far as to take it away and "fix" it when my aunt restrung it for me. I golf left, since he wasn't a golfer and didn't teach me. I also fight left (if that makes sense). That was the one area that he liked me being a lefty, since it confused him when he was teaching me to box. He figured it would confuse "normal" people as well so encouraged me to learn everything backwards.
Our meals seating was specifically set up so that I had a spot where I wouldn't bump anyone, but on the occasions that we would get to go out to eat, I got first choice on seat.
Didn't help that we were dirt poor, so I learned early on that you didn't ask for anything special. The good news is that I am not confused by right handed scissors and can use tools equally well with both hand.
Now I'm proud to be a lefty, of course. My father in law is jealous because he was forced to switch as a child. He writes, throws, golfs, etc right dominate, but gravitates to the left for new activities. At least until the indoctrination takes over and then he switches (totally subconsciously). He's 70 years old now.
ETA: I initially read the title as "lefties untie" and got all concerned because, you know, knots are tied tot he right!