Pinging enemy ward placement

Exactly what it sounds like, we have a ping for MIA, Danger, Retreat, Assist, OMW, or just general ping. I think adding a ping to alert ganking friendlies of ward placement you see being placed that stay on the map for a short time. I've found it quite dangerous to stop and type to tell others what that ping meant in the first place, or others immediately run to where I pinged because they thought I needed them there.

Just a thought.