No need to remove it. I bet new player might be loving it!

BUt it should have an option at configuration (or command line) to turn the icon on/off so those that don't like it (like me) would just do an "/aggromarker off" and have problem solved. ^^

Same should be done to quest marker. Those who don't like quest markers and prefer to explorer would just do a "/questmarker off" and hide it. ^^