What are your thoughts on the "Zombies, RUN!" GPS-powered video game for smartphones?

• I think it's an awesome alternative to FourSquare!

• I worry that this may lead to stalking or lack of privacy...

• Wait, I get to have an excuse to exercise AND play video games at the same time? OMG!

• It's about zombies.. I'm in.

• Not my cup of tea/cofee.

• I never played FourSquare but this sounds cool!