This script detects who's aiming at you.

//This script was designed by Han Shuffle AKA MichaelRyan Allen AKA Dugley Reanimator
//Cleaned up a bit by another resident.
//Cleaned up some more by another resident.
 
default
{
    state_entry()
    {
        // black and transparent floattext
        llSetText("", ZERO_VECTOR, (float)FALSE);
 
        llSensorRepeat("", "", AGENT_BY_LEGACY_NAME, 90, PI, 0.1);
    }
 
    sensor(integer num_detected)
    {
        list output;
 
        integer i;
        do
        {
            key agentKey = llDetectedKey(i);
            string agentName = llDetectedName(i);
            vector agentPosition = llDetectedPos(i);
            rotation agentRotation = llDetectedRot(i);
            vector ownPosition = llGetPos();
 
            if (llGetAgentInfo(agentKey) & AGENT_MOUSELOOK)
            {
                if (llVecDist(ownPosition, agentPosition+llRot2Fwd(agentRotation)*llVecDist(ownPosition,agentPosition)) < 1.5)
                    output += [agentName];
            }
        }
        while (++i < num_detected);
 
        llSetText(llDumpList2String(output, "\n"), <1.0, 1.0, 1.0>, (float)TRUE);
    }
}