Me: "If this API is prone to misuse by a careless or clueless developer, that is a security issue that needs fixing."
Me: "If the tests pass even if I change the logic of the source code, then the test doesn't actually cover it. I don't care what the code coverage metrics say."
Me: "The threat model needs to state its assumptions as well as both risks both mitigated and not mitigated."
Other projects, apparently: "Well this attack is outside our threat model so we're dismissing your report, but we'll eventually fix it as a defense-in-depth if we really must I guess."
Step up your game.