You should be able to ping your ping.
I love the new ping system. It makes everything so much easier to communicate. One thing it could use is the ability to ping your ping.
That way, when you say "lag", you can actualy back up your statement with evidence. If people say "oh, thats what they all say", you can just show em your 500 ping and there'll be less fighting.
It could also tell people when not to fight. Imagine an alistar pinging that hes gonna engage or a jungler pinging a gank. If you ping your ping beforehand, you can show em that you might not be up to the challenge due to lag.
I just think adding this would be useful.
"Dude your ping isn't that bad, it only says 134"
"I pinged that 12 seconds ago"