Even with obfuscation you tend to just end up with the code, but all the identifiers are replaced with a, b, c, etc.. I've still been able to figure Bluetooth protocols and other things without much trouble. For pirates, impersonators, and malware creators, they often just have to find free/pro/goods counter/license check/sig check or add in a call to their own extra code to run. So a little tougher for them, but not the end.