I wish I thought of that

I've done it and the police came to investigate me.i had to explain it was a joke and that I meant no harm:/

What you should do is answer in a language that not widely spoken where you live. Google translate a phrase. Use it to confuse the heck out of whoever is calling. End with "I don't speak your language" (in the other language), then hang up.

http://www.quickmeme.com/img/aa/aa0b493149282029bf0e0ddd1b5c5aa8f7dab38f2259f3932b289edbaeeed9aa.jpg