Yep, that's a valid concern, especially if you're already famous. (As far as I know) that was never an issue to me. It's good to be the peasant.
I don't know of a solution to this. No one wants to hear the same jokes for a decade. To get new "best stuff" you have to experiment. When you experiment, it may not be funny/ready. And with today's technology, it can be recorded at any time.
Similarly, we have a Circus Open Mic in Seattle (https://www.facebook.com/events/533760116677373/) where ground rules are that admission is free and open to the public but it's generally a supportive and in-community audience. We've had comedians, magicians, aerialists, acrobats, jugglers, extremely weird people, clowns, and strip history lessons.
I present both of these as ideas for ways to develop and grow without being subject to eternal Google search indexing and YouTubing by random civilians. I think both of these seem to come down to controlling the venue and rules. If you experiment in a bar or club, you're in the wild.
We do these in theatres, black boxes, and dance/performance spaces. This allows us to control the door.
We solve this problem in Clown Jam by essentially just being audience for each other. It's open to anyone who wants to come practice but no one is a "civilian" and there are reasonable person ground rules about posting pictures and video.
I don't know of a solution to this. No one wants to hear the same jokes for a decade. To get new "best stuff" you have to experiment. When you experiment, it may not be funny/ready. And with today's technology, it can be recorded at any time.