Keendog,
I echo the sentiments of many of our respondents. If you're using a receiver at an airport, use headphones or an earpiece. If you're in public, keep the volume at a reasonable level so you don't annoy others. If there are signs forbidding the use of radio receivers, obey them. Finally, if you overhear an emergency in progress or something equally 'juicy' then keep it to yourself, no matter how tempting it may be to spread the word. In short, just be discreet.
Good luck and good listening
