As per Adjudicator Round up:

Just a request for a Left/Right click for Pinging or alternate buttons for pinging, then you can have 1 Defensive type warning and 1 offensive type warning, 2 different sounds would be ideal. This way you can communicate a bit more effectively with the same type tool.

Often times I ping 2 objects, IE 2 different heroes, if i want 1 as a primary and one as a secondary id have to type to be specific. This got great reception @ round up as a very nice added option.

+1 that makes sense and it would also add a little more strategic depth in the game as well.. good idea!

Totally makes sense. Something like a blinking shield vs a blinking (numbered for prioritizing?) Jolly Rodger vs a Blinking Sword, with a "Call to Arms" type sound for defending, a "Doomsday Laugh" for ganking, and maybe a "Chaaarge!" for a pushing ping as well.

Can't have too many, as that would get confusing, but having a primary/secondary gank target, a pushing notification, and a defending notification, I would be totally okay with.

something like (control, shift, or alt) + (1,2,3,4) + (left click minimap/hero) would be awesome, not too clunky, and help teamwork a lot.

Perhaps could isolate this functionality to just an "elected team captain", if people felt it was too obnoxious for all players to have.

It would be quite good ....if this all I could see see on the bigmap