New Ward Concept - Intruder Wards

As a jungler, I'm often faced with counter jungling strategies. While normal wards will help me defend against it by myself, the game lacks any sort of mechanic to alert my team to what's going on, aside from typing in chat "Hey I'm getting counter jungled, can you guys help me out?" or spam pinging the jungler when he walks over a ward.

And we all know how well chatting to your team works in this game.

So my idea is to implement a third ward type, an "Alert Ward" or "Intruder Ward" or something of the sort. Basically you'd buy it at the shop, it'd cost the same as a control ward or maybe even slightly more or less, I don't know I'm not a developer, and this ward would basically allow you to create a trip wire from one point to another (within a fixed maximum distance obviously) and if any enemy champion wanders over your trip wire, the entire team gets a global mini-map ping.

The ward itself grants no vision AT ALL until it is triggered, and lasts a fixed amount of time (one minute?). Perhaps upon triggering, it could give the global minimap ping and transform into one of those blue trinket wards. one shot and its dead, but at least it lets you know who's nearby. Perhaps the ward just flat out never grants any vision at all - I dont know, I'm not a developer. The community can discuss this.

This gives junglers a way to announce to their entire team that someone is entering their jungle that shouldn't be.

OR it gives advantaged top laners an opportunity to booby trap the enemy jungle and set up for an aggressive invade. OR it notifies your whole team that someone's snooping around the baron pit. It could give a lot of strategic options, but mostly I thought of it as a way to announce to my team mates "Hey, I'm getting counter jungled. Here he is. He's right here. Help me!"