The Bears did that with Urlacher/Peppers for years, strangely enough Peppers blocked several kicks during that time frame too.
I think no advantage is a charitable reading of it, if it gave no advantage why do teams do it?
This was the first time it was called but apparently the NFL has been putting up examples of calls that should have been made out their in the ref prep videos.
The same stuff got said about the leaping penalty, the lining up over the long snappers head, etc.