I understand that, a lot of people don't care, but others do if the official forums are any indication, hence the update. Also the communities we hear about announcing where they are going are a vocal minority, the vast majority (the people who only lurk or are completely oblivious to forums and communities) will most like not be polite. The "if they choose english server, they need to speak in english" has been a topic of hot discussion since the beginning of time.
Anyone that has ever been in an unofficial server for the Spanish, Italians, Greeks, Poles or Brazilians are likely to be interested in avoiding them than someone who never was.
Personally I'm Portuguese and the way our community talked back then (and now) has not changed and is absolute poison. So feel free to abuse that ignore and report button as much as you can.
And they say Blizzard games don't have bugs. - Anub'arak