[hnbroseph]

You could say the same about (for example) a Python-based QT app. Or any scripting-language based application or framework.

It's also true to say something like "Rails can be back-doored by modifying the code and redistributing it to unsuspecting developers!"

Actually, you could say the same or similar things about many applications, including binary distributes. With some analysis you can figure out what conditions a jump instruction is using, and modify it to always jump where you want. Cheat Engine lets you analyse game memory at runtime and substantially modify behavior.