Jorma is a pretty high level performer here and I am pretty sure that his contract has a no-recording clause in it. It's also possible that he might have been un-aware. This is a venue with lights, sound, etc and I know as an artist when I am on stage in a venue such as this, seeing what is happening in the audience is not something I am focused on.

This is more about what the organiser can do to prevent this rather than the performer.

Deb