this is absolute bullshit. it's one thing for Jerry's Crochet Patterns Dot Wordpress Dot Com to display prices without GST because jerry made a genuine mistake and has never dealt with the logistics of international sales before. i'm not mad at jerry for "US defaultism" or whatever.
i AM mad at massive corporations who can't be fucked to add if (country == "AU) { price = price * 1.1 } to their shitty website. "oh but we're an american company, in america you don't need to include tax" i don't care. you're selling to australians, you're listing prices in australian dollars, you have a fucking ABN, you need to comply with australian price display laws.
YOU CANNOT DISPLAY PRICES WITHOUT GST. you cannot have a page that says "this costs $20" and proceed to charge anything but $20. you cannot say "$5, plus GST" or "$8, plus local sales tax".