The use of electronic devices during theatrical presentations

What do you think about the use of electronic devices during theatrical presentations? How do you suppose the use of such technology differs from the type of experience you might have had at the earliest, ritualized theatrical presentations? Will differing theatrical patrons have varying biases concerning the use of such devices in the theatre? What might cause these biases and what are the pros and cons of using such devices? Is there a difference between the use of electronic devices in live theatre and in the cinema? How does the use of electronic communication devices relate to your idea of theatrical etiquette?