What does all bad precedents began as justifiable measures mean?

The phrase "all bad precedents began as justifiable measures" suggests that decisions or actions that later lead to negative consequences often start with seemingly reasonable justifications. It highlights the idea that, in the moment, these actions may appear necessary or beneficial, but they can set a dangerous standard or lead to unintended outcomes over time. This serves as a cautionary reminder to critically evaluate the implications of our choices and their potential long-term effects.