As the title says, is there one already available? Or is this something that should be created?
The database, should include the serial number, color, year, & date stolen. Additional info would be pictures and details of the theft (location of theft, where the gear was in your car, how it was removed from your car, etc). I believe this is something the kiteboarding community needs.
My personal preventative tips:
Write down the serial numbers of your gear.
Take pictures of your gear
Don't store your gear visibly in your vehicle (trunks or coffin boxes are best)
Don't advertise by putting kite stickers on your vehicle
Lock your vehicle (don't stash your keys underneath)
Park near other kiters
Take pictures of suspicious people (and don't be shy about it)
Don't store your gear in your vehicle overnight.
Consider Renters/homeowners insurance