You can't fight the drug gangs with "Sonic Defense" devices.
For personal safety, I would not do anything more to
draw attention to myself other than playing obnoxious music loudly.
Besides, they might retaliate by pulling up in cars tricked out with loud
sound systems and just park in front of your house.
Go to the Police? In Puerto Rico? Some of THEM might be in the pay of the gangs.
Tread carefully here my friend. You could end up with a brick or
Molotov Cocktail sailing through your front window if the sellers
think you are making things difficult for them.
It's your wife's house? So I assume she was raised there and/or
has family and friends living there for generations? Use her and them
as a resource to *quietly* make inquiries as to solutions.
AS far as annoying music, absolutely NOTHING can compare
with the theme music and lyrics from the Disneyland/Disneyworld
ride "It's a Small World". Inside sources reveal that the CIA really
learned Bin Ladin's location by forcing prisoners to listen to that song
endlessly for hours and hours. The recalcitrant prisoners were
forced to go on the actual ride!http://www.youtube.com/watch?v=N6Y7RX8rVzQ
THAT should be against the Geneva Convention!