I'm from the Philippines, and there's no shortage of things to be ashamed about:
poor education
horrendous leadership
corruption in the government
general disregard for rules and laws
general stupidity and pig-headedness (its like the stereotype people have of Americans, except without the "rich and powerful country" prerequisite)
And I'm not even getting started -__-
If I'd have to pick one though, it'd be the way most Filipinos generally act like idiots on the web. Barely literate for most parts, never anything useful to contribute. *sigh* It sucks being in a third world country.