I would like to see a button added to the top left side of the screen, much like where the buttons are for Courier sharing, etc. One button up top to mute ALL map pings, and one button on each team mates portrait to mute just their pings.
In addition, one-click would mute their pings. Two clicks would mute their pings and prevent them from even showing up on the map or in-game. A third click would reset it back to see their pings again.
The reason I want to see this happen is because sometimes you have 2-3 people pinging at once and it gets confusing. Some people like to ping a LOT about everything under the sun, and that too is annoying. Then you have your griefers who just spam the ping to annoy you.
Hopefully a simple addition to the interface.