All of these ideas are inspired, thank you!
and the fog horn idea made me laugh out loud and spill tea over myself...now everyone in my office thinks I'm a nutjob!
This one:
Thanks Sigga for the links - really helpful stuff.
You've all renewed my faith in Geoexpat as a source of good advice and info!
Except for tonyaki, who really shouldn't be surprised if his/her neighbour goes for the headbutt/slap option...