Fair point, but what is there to stop someone goinging to rec.aviation.XXX newsroups (for example) and asking "What does TCAS mean", etc.
In fact most people on the web can use Ask Jeeves (just did TCAS and it knew the answer) - it also knew VFR, IFR, CVR, ATPL, CPL, NTSB, etc.
Enthusiasts have books too!