There are two issues here. Intended fire and accidental fire. If you honestly think a few extra pounds of trigger pull provides some level of protection against accidental fire and that this level of protection is more important to you than the added ability to shoot well that comes with a reduced trigger pull, then don't modify the thing. If you're debating whether or not a shoot is justified, the trigger pull weight is entirely irrelevant. Carry what you feel is the safest option considering safety and ability to hit what you're intending to shoot when the time comes and forget about the rest. The Zimmerman fiasco has the CCW community convinced that if you pull the trigger you're going to end up defending yourself in court. A vast majority of justified shoots never even get the prosecutor's attention. Carry what you shoot well and let the chips fall where they may otherwise. I would also be wiling to bet that the investigators and prosecutors aren't even aware of or will notice things like modified internal components and trigger pull weights unless they are also gun nuts, in which case you're already good to go if the shoot is justified.
tldr: version. modify whatever you want, don't make dumb decisions, hit what you aim at, and you're good to go. If you consider trigger pull weight a safety feature, you already lost.