In the new release of the Skype 3.8 client there is this new “feature”, with this explanation:
In addition, we’ve hidden the avatar by default in incoming authorization requests. Some people have been using images that others don’t find all that pleasing.
But what about “unwanted calls”?
As you can see, the avatar shown in the chat request is hidden by default, but the avatar from the call is shown! Therefore, even for “new callers” they should hide the avatar by default if they want to be consequent!