The thing about the Smoke on the Water riff is that a lot of people don't even play it properly. I've seen many people miss the little slide or use a pick instead of fingerpicking. Some even do full powerchords instead of the 5th+root ones which is just blasphemy, heh. I wonder how Blackmore feels about the whole meme; well he lives in a castle so he probably doesn't care or even know.
On topic: When people say "How can you enjoy it if you can't understand what they're saying?". I enjoy many genres of music incluiding Pop, but I get a bit sad when the lack of instruments in popular music leads into people thinking music is just about vocals.