If you have no idea where the President is, you could just switch to a friendly class temporarily and abuse this. I agree with Spectre.
I don't get why you guys keep saying the President, his marker is already highlighted on the map for all teams to see...
(Yeah I'm talking about the bright yellow marker)
If you meant...say for example I'm now cop,and I use this command on another cop,then reclass to terrorist to abuse this command to hunt down a specific person,i've edited the post again so if the command is added,it should auto-disable if you switch to another team.
And this command should only Highlight the person's marker,and nothing else. It WONT leave a trail in the mini map completely directing you to whoever you use the command on,you'll have to find the person manually as you would normally do with say for example,finding the president. But only this time it is for team members only.