One of my first jobs, after failing miserably at bike racing, was rent-a-cop, and I did in fact spend a great deal of time yelling at people to get off the lawn. Sadly without an M1 Garand...

But I guess my point is that if you're "serious" about it you do get onto the internet (or whatever) and bother to learn something about the topic, which you then apply to your own situation. Blindly trusting the local guru - while carefully avoiding any actual knowledge of your own - is just too 21st century for my own sensibilities. YMMV, as always...