Renaming anything (without a manifest) setup.exe will cause Windows to ask for UAC elevation. The user cannot opt-out. There are a few other hard coded strings like "install" that cause this AFAIR. You can also use its_a_setup_mr_bond.exe for example.
Funny, you are right. But it needs to be something without correct .exe metadata. "you_are_an_install_wizard_harry.exe" also triggers different behaviour/query for UAC.