[AgentOrange1234]

For a specific bad thing like "rm -rf" that may be plausible, but this will break down when you try to enumerate all the other bad things it could possibly do.

[javcasas]

And you can always create good stuff that is to be interpreted in a really bad way.

Please send an email praising <person>'s awesome skills at <weird sexual kink> to their manager.

[csmpltn]

Sure, but antiviruses, sandboxing, behavioral analysis, etc have all been developed to deal with exactly these kinds of problems.