You know, now that I think about it, the first time I really, truly Noticed was during the Brazilian invasion of Korean MMOs. Unfortunately, both Americas were usually lumped into one server, so you would get the "huehuehuehue gib moni pl0x" spam, but it actually went deeper. Those animals had zero respect for the culture and etiquette of online games on English-speaking servers. They had no concept of actually putting in work for something, or fair trade, you never actually saw them grinding. It was always "gib moni pl0x" so they could get the powerful items without working for it.
It has been ingrained into me since Ragnarok Online that not a single Brazilian is worthy of respect as a fellow human being. They are all animals. Every single one of them.