Bing Map API Key not affecting tiles

[TAlecksen]

I am trying to input my own Bing Map API key but am finding that no matter what I put into the client key entry:

BingSatelliteMapProvider.Instance.ClientKey = "gibberish";

The tiles are always successful at downloading and displaying. This seems to imply that the key is not being used. I am concerned about making sure we are using the tiles legally but can not find how to change the key.