For real though, it's not very practical telling your jungler through chat that your enemy laner has warded that bush, and I don't really think it would be that much of a struggle adding a ping for it. It would only benefit the overall teamplay you can offer your team.
Plus it would melt down another advantage premades have over soloQ players (because in most cases they just verbally tell each other).
This has probably been suggested before, but I really don't see why Riot hasn't added this yet. So yah.
Have a great day summoners <3