Final answer:
Instant messaging protocols are dangerous for file transfer because they bypass server-based virus protections, increase the risk of downloading malware, and compromise privacy and security.
Step-by-step explanation:
Instant messaging protocols are dangerous for file transfer because they can bypass server-based virus protections, allowing potentially harmful files to be transferred without detection. Additionally, these protocols often involve file sharing, which can increase the risk of downloading malware or viruses. Furthermore, instant messaging protocols may allow everyone you chat with to view all your files, potentially compromising your privacy and security.