This "be careful of recording" line is harmful, because folks tend to read it and assume that it is universal - there are places where it is unilaterally allowe

This "be careful of recording" line is harmful, because folks tend to read it and assume that it is universal - there are places where it is unilaterally allowed if you have good reason to suspect not having things recorded will result in your rights being abused. Then there are places that just don't care if you do.