I've never thought or heard this! I can count the number of alcoholic drinks I've had in my life on one hand and go out plenty with my friends and family to bars, clubs, bbqs, parties, weddings and such... I don't think I'm rude, why would that be rude? I can't even understand any reason for it to be rude! I'm there to chat and dance, I find water fuels me more haha. People generally know I don't drink these days, I do notice my Mum is quick to tell people I'm breastfeeding when they are offered whereas I'm happy to just say I'm not a drinker without any qualifier so maybe its a generational thing? She is 50, I'm 24. Might also be the circles somebody mixes in, although my friends are regular drinkers it isn't a big deal, I suppose - whether you want lemonade or gin is as similar as whether you are having fish or chicken. I've never really noticed whether people around me are drinking or not, I assume most people do and I'm fine with that - their body, their choice!

I also have never drunk tea or coffee and don't have soft drink or juice (never had coke), I only drink water aside from maybe a few times a year so I must be super rude lol.