Find the odd social behavior (crime vs attitude): Pick the option that is not a criminal offense but a social trait/attitude.

Introduction / Context:
Legal vs social-behavioral categories offer a crisp separator. Crimes are prohibited acts punishable under law, whereas attitudes are dispositions or behaviors that may be undesirable but are not, by themselves, criminal offenses. Mixing these yields an unmistakable odd-one-out.

Given Data / Assumptions:

• Blackmail: criminal coercion to obtain money/favors by threats.
• Smuggling: criminal transport of goods/persons contrary to law.
• Forgery: criminal falsification of documents/instruments for deceit.
• Snobbery: a haughty/elitist attitude; socially disliked, but not a crime per se.

Concept / Approach:
Classify each term by its legal status. Three are codified offenses with elements and penalties; one is an attitude without statutory criminality absent additional acts.

Step-by-Step Solution:

Verification / Alternative check:
Check legal codes or common definitions: the first three entail unlawful actions; snobbery is descriptive of demeanor.

Why Other Options Are Wrong:
They all denote prosecutable acts rather than mere dispositions.

Common Pitfalls:
Do not equate moral judgment with legal status; illegality requires defined acts.

Final Answer:
Snobbery