I had a fun experience with the Instagram-effect recently. I tried to visit an arboretum earlier this year (don't judge me, it's interesting!) and I couldn't get near the viewing platform because someone had a crew lighting their shots for Instagram. They asked me to wait for a couple of minutes to get finished, which I did. Ten minutes later a crowd had built up on the ramp and I just pushed past and said "all right good work today everyone we got what we need that's a wrap!". It's nuts.
It's also weirdly disturbing to me that the presence of someone with an expensive looking camera was enough for a lot of them to just walk on past instead of enjoying the day out they paid for.