Originally Posted by NotWithoutTophat
Just a warning: Using that code (most likely a developer code) means you are forcing your way in and if it's during maintenance, it can mess up your client. Apart from that, you can be banned by using it.
You wouldn't be banned.
But, they are more likely to remove it's usage the more it is abused/spread around.
It's been around for a LONG time, I've yet to hear of a single player being banned for it's usage.
It's something THEY built into their client, you don't intentionally put things in a game then punish your players for finding it, without somehow restricting usage on the back end.
Riot just isn't that kind of company.