This has been an interesting thred to read. It seems like it's almost universal that people don't really talk about their interest in LBT to real-life friends and/or family. Of course I assume that the majority of this forum's userbase is from the USA, but I wouldn't be surprised if this phenomenon reached other countries and continents as well.
As for me, personally, it's kinda 50/50. Now that I'm an adult I honestly don't care what other people think. Of course it's not the first thing I say about myself when I meet other people, but if it ever comes up, I won't shy away from the subject or deny anything. I unironically enjoy this film series and have grown past my shame of enjoying it.
As a child, maybe up until I was 7, I was open about it, because I think it was more acceptable to like them as I was part of the target audience. Older kids didn't watch them so once I became older, I didn't tell anyone I liked the movies anymore. I felt shame when I asked my mom if she could go and rent the 10th movie that just came out, but in all honesty... my mom was very understanding. She didn't judge me, but despite her kindness I felt awkward about it. I have two older siblings who are five and four years older than me, and sometimes they made snarky remarks about me liking LBT movies but it was never with ill intent.
Once I met my future husband at the age of 15, I was hyped to know that he, too, was an LBT fan and that we shared the same favorite characters and movies! Fast forward ten years and we've collected the movies (DVDs and VHS) and once binge watched them all in two days with my sister-in-law. It was good fun and while we didn't convert her to be a hard-core LBT fan, she was still glad about the experience.
Also my school-mates from the university of applied sciences knew about me being a fan, and once we watched the first movie together. It felt great, considering that every one of them is into animation (I mean, that was our line of study lol) and no-one judges each other for their preferences and interests. Also some of them hadn't seen the movie before, so it was interesting to hear their opinions on it, too.
But nowadays if I watch LBT movies, it's either with my husband or alone. Usually when he's out of town, I watch the seventh film or just put it on the background, as it is one of my go-to comfort films. But if I ever feel like watching those films with anyone, I'll just simply ask them.