A "trap is here" and a "ward is here" ping would be nice

These are needed.

Warning pings can be very unclear as to what is being cautioned. Say Teemo just shat out a couple of shrooms and your low health ADC is about to waltz right over them. Sure you could spam warning pings, but they might just take it as "back off because you are too low and we don't want to fight without you" or something like that, not "don't walk here because Teemo will ruin you". But if you could ping "trap is here" then they won't walk there. Sure chat is there to help, but typing is not faster than pinging, and sometimes is overlooked.

Sometimes I also want to ping wards to my support or whoever has sweepers or a pink so they know where to clear it, and the Jungler or Roamer knows not to walk there. This way when the gank fails before it even started, you cant be blamed by the Jungler or Roamer for a bad set-up/engage when they missed your warning ping(s) and / or chat message for a ward you couldn't clear just yet.