What are the myths about an online port scan?

Security of data and computers always remain on the topmost priority of the businesses. Due to the advent of modern and evolved threats, sometimes the tools which should be protecting become the cause of damage. Here, my question is, what are the bubbles/ myths related to online scan ports.

Well,
After a short research one of my team member has written this.
linkedin.com/pulse/5-myths-online-port-scan-the-web-orion/