Those of you who feel that, for whatever reason, you will need to go looking, why not get some training?....That kind of training will be expensive and time consuming. But it will at least give you some small idea of what you'd be up against if you chose to go looking for a possible bad guy in your home or on your property. It will also introduce you to various techniques for doing something that is unavoidably difficult and dangerous. (And just as a guess, I'd kind of suspect that after taking that sort of training, some of you won't be quite so anxious to go investigating things that go bump in the night.)
Good advice, and while I haven't done it yet, I trust your judgment regarding your guess. It is consistent with what others who have taken training have said on this thread and on the one about "clearing a house".
I, for one, cannot comprehend why people with neither training nor experience would choose to disregard the advice of experts.