The thing you have to realize is that most "hacks" are simply using options that are already built into the unit -- hidden menus, simple altering of firmwares, etc. There's really no way to actually hack a player, because they're all essentially proprietary closed systems. Because of how pissy "Hollywood" got over the years, menus have been more buried or completely missing, and firmware has been more obscured to editing.
The likelihood of "hacking" a Blu-ray player is almost nil.
However, it's really a bit of a moot point.
Read this:
http://www.digitalfaq.com/forum/home...s-regions.html
Just make the DVDs "region free" and then there's nothing to worry about, in terms of region restrictions.
The secondary issues is, of course, PAL and NTSC playback. Then again, however, most DVD players are manufactured cheaply in China from kits designed for worldwide use. It's harder to find an NTSC-only or PAL-only player than it is to find one that easily plays both. Sony is one of the few stand-out brands that adheres strictly to formats, and appears to manufacture models by country or region (instead of using the pre-fab kits).