Brazil is a country full of Brazilians--some of the worst peoples on the planet.
Brazilians will constantly question everyone with an annoying "BR?" in order to figure out if the person is Brazilian. If the person isn't Brazilian (the usual reply of "fuck off" tends to give it away), the Brazilian will start yelling about reporting the person to mods--if he doesn't attempt to scam the user first, that is.
huehuehuahue is Brazilian onomatopoeia for a laugh. Normal people will write "hahaha" (English), or "xaxaxa" (the Greek X has an h sound), but Brazilians are clearly mentally disabled so they laugh like "huehuehuahuehuahuehue."