"Weeaboo" is an insult people use to bash anime and manga fans, especially ones who behave rowdy. "Hasdrone" is an insult people use to bash bronies who still like the show post-season two or three. "Hasdrone" isn't so widely used anymore compared to the hiatus between seasons three and four, but "weeaboo" is still widely used online. Both of them are a byproduct of cyberbully culture and used by entitled, self-absorbed scumbags who feel it's a great idea to bully or troll others.
Well, newsflash: There's no factually good reason to be a bigot and use either slur under ANY circumstance. The second you use either of them, you don't look better than them. Instead, you become one-hundred-percent more pathetic than the people you shoot down.