Final answer:
MRTs should not share patient information due to the privacy and confidentiality laws governing healthcare. Other activities like posting educational content, having professional discussions, and providing general health advice are acceptable if they don't compromise patient confidentiality.
Step-by-step explanation:
Due to the highly accessible nature of social media, Medical Radiation Technologists (MRTs) should not be sharing patient information. This is a direct violation of patient privacy and confidentiality as governed by various laws and professional codes of conduct, such as HIPAA in the United States. On the other hand, posting educational content, engaging in professional discussions, and providing general health advice (when done responsibly and without disclosing patient-specific information) can be beneficial for community outreach and professional development.