EMDrive appeared for quite a while to work in a way which contravened the laws of physics. That didn't falsify the more parsimonious explanation of methodological problems in the experiments analyzing it. Just the opposite, it turned out to be an early warning that the more remarkable explanation wasn't true.
As a rule of thumb, if something you're looking at breaks the laws of physics, the most likely explanation is that you're looking wrong or have mistaken assumptions about what it is you're seeing. None of this means I am opposed to an alien explanation for UAPs, just that they aren't my first explanatory resort.