LF: you seemingly missed the part about new entertainment systems on airplanes fitted with cameras that can record you during your flight. And I believe you travel on airplanes. The airliners claim not to have recorded with it yet, and that they didn’t request its installation. But it’s still there, and likely hackable. And guess what, the airlines have your name and identification.
Additionally, even if your musical hobby is low key, it just takes one person to identify you on a video clip or photo, and then potentially link it to other footage out there. Again, hopefully no one is interested in you, but criminals can and do pick on random people. A good example of random targeting is identity theft, which is really pervasive.
I once googled a sheitel macher I was considering as I needed her telephone number. Instead I got the Simcha site photo of her and her husband. It sort of shook me up. This is the world our kids are getting NOW, even if we ourselves may have missed this specific boat.
(B”H we managed to avoid this with our married kids so far. But it took effort to almost ban cell phone photos – we were the exceptions – at their engagements. And other family members that couldn’t attend weren’t exactly happy about it. We only forwarded photos to close family we had to and REALLY trusted. But even with all our efforts, there were really no guarantees.)