Agreed! We're often at the mercy of visiting company's demands, and regardless (and depending on the type of house you're in) physically getting to the offending audience member is sometimes more disruptive! I also once had a visiting stage manager complain that I opened the door during the performance (they were big on blackouts) as I was letting a young girl with learning difficulties out who was being disruptive, therefore her Mum decided to take her out and calm her down, it's often the lesser of two 'evils' (also that SM called me a boy to my manager, who was less than impressed....)
On the subject of children at the theatre I was ushering this weekend at a show that a small boy was far too young for. Dad did his best to keep him quiet but my favourite outburst was 'Romeo and Juliet, that's a tragedy because they die!'