emotedcreations

Actually, I'm not sure either. There are laws prohibiting the use of nazi symbols. But I don't really think the Deutschlandlied is part of that. There are not different versions just those three verses. As I said in the thread the first two were dropped and are not used anymore. If you use them, over here at least, people will likely think you are a nazi or at least very very right-wing, as only nazis will sing those verses. Germans are pretty humorless on this particular issue.

Can you read german? Here's the official history of the song.
The nazis used the first verse only, the other verses were verboten, and they added the Horst-Wessel-Lied, the SA song, after the first verse. That became nazigermany's hymn.
After the war the allies put the hymn on the index. Adenauer fought to have it back as the national anthem using only the third verse.
Still doesn't answer the question whether it's illegal to sing the first verse today, but I doubt it. Otherwise it would have been mentioned.

You learn something new every day. Though I'm pretty sure I've had this in school. Just too long ago.