If you're someone who can easily breezily send that IM without a second thought, power to you and congratulations on being well-adjusted. To me, despite the aggressiveness of the phrase itself, an "abuse report" is the most neutral method for both parties. Maybe it isn't the most neighborly but I don't subscribe to the idea that it represents a momentous act against a fellow resident. Right click and report the object itself. If found in violation the object will be returned. Its owner won't go to SL jail.