Final answer:
The biggest problem faced when unflattering content is posted about you on social networking sites is that it's nearly impossible to completely delete such posts as they can be shared or saved by others, potentially damaging your future opportunities and professional reputation.
Step-by-step explanation:
When someone posts something unflattering about you on social networking sites, the biggest problem you face is that it's nearly impossible to delete what others post about you. The permanence of online content is significant because it can impact future opportunities such as college admission or employment. As seen with cases like comedian Kevin Hart, negative posts can resurface and affect one's professional reputation. Therefore, it is crucial to consider the long-term implications of your online presence. Before posting, think about your audience and the potential impact of your message. Remember that your digital footprint has a lasting effect on how you are perceived by colleges, employers, and other important stakeholders in your life. Moreover, even if you can delete your posts, others may have taken screenshots or shared the content elsewhere, making it difficult to completely erase the unflattering information. Hence, it is advisable to be discreet and carefully consider the consequences of your online activities.