Yesterday, my colleague has found his application stolen by other "developer". I looked closer to other applications of that "guy" and found out that he has stolen also my games. He just decompiled the apk file and replaced graphics and manifest file (of course including admob ads id). That is very, very wrong!
To be clear. I don't care if somebody is using the game idea and makes his own version from scratch. Sometimes I'm doing that, by cloning known games with some modifications. But I don't use others games and sources. This is the way how you can learn. This is the time when your mind can blow up with great game idea!
Conclusion: cracking applications and publishing them as yours is not fair and it breaks the intelectual property law!