We go shopping in grocery stores that sell kosher food alongside the non-kosher food. We shop in department stores that sell acceptable items alongside non-tznius clothing. We each have to decide for ourselves which items we can buy and which ones we can’t. Every adult has to trust his or her own judgment.
I personally have given a lot of thought as to whether I and my children should visit public libraries, and what we should and shouldn’t read. It was not an off-handed or emotional decision.
This lecture just comes across as ‘holier-than-thou’ posturing and an attempt to stifle independent thought.