Those acoustic weapons don't work - at least to keep pirates away..
http://blog.wired.com/defense/2008/1...blaster-f.html
The nonlethal weaponry may not work as advertised. It
might also be very lethal as tasers have demonstrated.
That sword cuts both ways and directed energy weapons
are available to the general public. Here is a weaponized microwave oven
and here is an example of burns caused by such a weapon
