Simple solution, take the phone apart, then cut some traces for 2 power connectors and 2 data connectors, then taking some thin wire, swap them, then do the same for your charge/sync cable.
then if someone decided to copy your personal info, they will get pretty sparks from the phone instead
modern smartphones often skimp on diodes and other protection circuits in order to reduce the cost and size of the unit, this makes it easier to fry them if power goes in the wrong areas (the only areas with any real protection, are the charging circuits, but send power into one of the data pins and you will quickly begin to fry things in the phone (just fine ones with the least protected paths to any of the memory chips for faster results)