"Why do you want to protect your IP/time/effort rather than giving away your source code? I don't run binaries as a general rule, nothing to do with ghost, which looks cool, btw." is totally fair.
Assuming bad intent, malware, or hidden wrongdoing is not neutral criticism - it is warrantless attack.
Assuming bad intent, malware, or hidden wrongdoing is not neutral criticism - it is warrantless attack.