Final answer:
Sending a blind courtesy copy of an email can inadvertently expose sensitive content or opinions not intended for wider distribution, as demonstrated in the scenario where a teacher forwarded an attorney's email to a student without permission.
Step-by-step explanation:
Sending a blind courtesy copy (BCC) of an email can lead to unintended sharing of sensitive information or professional opinions that the author did not intend to make public. This is evident in the scenario where a teacher forwards an email to Sam, containing advice from an attorney without informing the attorney, resulting in the attorney's upset reaction. The attorney's negative remarks about the individual were not meant for broader dissemination, illustrating the risks associated with forwarding emails without the original author's consent. Always getting permission before forwarding and considering the potential for emails to become public are crucial online communication guidelines to prevent such issues. It is also advisable to maintain professional etiquette in emails, avoiding using all caps to not come across as shouting and ensuring that your messages are respectful and discreet.