Yes, the question is twofold. When thinking sensibly, in this case, no immorality and illegality there. Indeed, the only benefit that we derive from reverse-engineering is the only higher quality game

. Ie. Exe cracked for improving the program, which has already purchased. Discussions on how to turn off DRM is not being conducted

.
But it could conceivably come to the ridiculous: in 2006 in Russia happened is that (probably Russia and abroad, the case made a splash)

: the headmaster had bought for school computers, which had been pre-installed pirated windows. The prosecutor's office seized the director of a stranglehold with a determination to defend the interests of Microsoft. Investigators were trying to close the deal "In the absence of a guilty person," and Bill Gates understand the situation refused to support a lawsuit against the director

. Persistence prosecution is simply amazing. The first time it stopped "in connection with minor damage" but the prosecution insisted on a new consideration, the court did not want to sit for a long time Director awarded 5000 rub. (~ $ 180) against the alleged 262,000 rubles. (~ 9500 $)
I am confident of the correctness of TheDarkWraith - who no matter how he knows all the pitfalls in this process.