What attacks can be caused by a user being unaware of their physical surroundings?

Shoulder surfing involves literally looking over someone’s shoulder in a public place and gathering information, perhaps login passwords. ARP poisoning alters the Address Resolution Protocol tables in the switch. Phishing is an attempt to gather information, often via email, or to convince a user to click a link to, and/or download, an attachment. A Smurf attack is a historical form of denial-of-service attack.