That's where WHOIS protection comes in handy. If you don't want to get even more spam (the imprint has to be clear text, no obfuscation so gets spammed a lot) but a website that could target Germans (or you're in Germany), you'll quickly get costly letters from specialised lawyers. Having Whois protection usually helps, they tend to give up if they can't get your address easily.
No, minor obfuscation is not ok. The same as a picture can be a problem for blind people, your example can be an issue for people not speaking english (it's a German law). I wouldn't take any risks with these laws.
