I agree with this thread, I know it's a bit old, but perhaps It should be revisited. Pings are useful, yet 1 ping will suffice, two for urgency, 3 at most. But when there's 6-8 rapid pings, I know I get frustrated and have to turn off sound in case it happens again.
Another problem I'd like to note, I've got a good computer and good internet. BUT, occasionally, lag happens, especially if windows decides to update without telling me in the background (not uncommon). This rapid-fire ping method that some players like to use had caused lag spikes in game for me, which is an issue NOT solved by muting my speakers.
Also of note: most of the players who ping like this are toxic or borderline toxic. They think that they know the game better than anyone, and can do whatever they wish. Asking them to stop I fruitless.
Finally I'd like to mention a related game that involved this recently. After dealing with lag caused by these ping spikes, I've been informed by a player during the results chat (that I muted in chat during game) that he was going to report me for "Failing to communicate with the team". The ignore/mute function exists, but if a player is even REPORT-worthy for using it, then the function shouldn't exist at all. I know that the report selection is intended for other circumstances, but perhaps could be phrased... better?