Many PKSF have discussed this and I think it'll be a pretty cool and useful idea:
So not all VIPs are in the PKSF's VIP tracker. A way to get around this is a new divisional tool that can be used to inject a tracker into certain players, allowing for them to appear in the VIP tracker. The tracker will last until the tagged person dies/resets.
That's it really. The only downside is that it can be abused as some sort of ESP but it's nothing additional guidelines and rules can't mitigate.
Also has event applications.
I also want people to suggest ways to add onto this or alter this