The500man,
Good grief! That is one of the most naive, if not stupid, posts I've read in my 18 years on PPRuNe, and in almost 40 years of professional aviation. You obviously have no real idea of how TCAS is used, or what it does and you show ignorance of how ATC and more knowledgeable pilots operate in Class G airspace.
TCAS is used as part of a normal lookout scan; it takes a split second to look down at the screen, which is why it's situated at the top of the instrument panel. There is also an audio warning system which alerts the crew about aircraft getting threateningly close. The equipment enables me to see transponding aircraft over ten miles away. If I see an aircraft on TCAS, I assume the pilot hasn't yet seen me (he/she/you won't have at ten miles), and will take avoiding action much earlier than is possible when constrained by the limitations of the human eye.
Judging by the lack of adherence to the rules of the air by many light aircraft pilots we see (they don't see us), I know it's an invaluable piece of equipment. It helps provide an extra level of safety to all parties involved, not just ourselves.
Obviously, if you insist on not using your transponder, in your ignorance, belligerence, or whatever, you deny yourself and your fellow occupants that extra margin of safety that is there for the taking.