The ONLY benefit of doing it is that it would enable you to play DVDs from other regions. If you don't have any such discs, then it will do you no good at all. However, it should not harm anything, either.
There is one other thing to remember when buying discs from other regions, and that is that many of them are PAL discs (not the NTSC standard as in the U.S.), and whether your player and/or TV can deal with PAL or not is a separate issue from the region issue.