[guiambros]

While the gesture is noble, you may end up hurting him/her in the long run. If media start linking to your domain rather than to the appstore page, he'll have broken links and lost pagerank if/when you decide to do something else with the domain.

Having said that, what a great domain!

[AznHisoka]

Plus if somehow Google thinks asteroids.com is a spammy domain (for whatever reason), it'll now be associated with his game.

[clamprecht]

Wow, if it's that simple, that is a great way to destroy a competitor's domain's reputation in Google, isn't it?

[austenallred]

Unfortunately it's even easier than that to destroy a domain's "Google reputation." Go on fiverr and buy a ton of spammy links, direct them at your competitor. It runs about $5 per 100,000 links last time I checked. (I've never done it, but it's a common blackhat technique).