When considering what constitutes a "big no-no" in Bhutan, it's essential to focus on actions that deeply violate their cultural and societal values. Here's a breakdown of particularly significant offenses:Severe Disrespect for Core Values:
Blasphemy and Disrespect Towards Religion:

Bhutan is a deeply Buddhist country.1 Any act of deliberate blasphemy or severe disrespect towards Buddhist beliefs, practices, or sacred sites would be considered a major offense.
This includes desecrating religious artifacts, intentionally disrupting religious ceremonies, or making highly offensive remarks about Buddhism.

Disrespecting the Institution of the Monarchy:

The Royal Family holds an extremely revered position in Bhutanese society. Any form of lèse-majesté, or disrespect towards the King or the Royal Family, is taken very seriously.
This goes beyond simple criticism and includes actions that are seen as intentionally undermining their authority or dignity.

Severe Environmental Damage:

Bhutan places an exceptionally high value on environmental preservation.2 Actions that cause significant environmental damage, such as large-scale illegal logging or polluting water sources, would be considered grave offenses.

Deliberate Acts Against National Unity:

Bhutan has worked hard to create a unified country. Actions that are seen as intentionally trying to cause division or strife would be considered a very serious matter.

Key Considerations:
Bhutan's legal system and social norms are deeply rooted in Buddhist principles and respect for tradition.3
The concept of "Driglam Namzha," the traditional code of etiquette, plays a significant role in shaping social behavior.4
In essence, any action that fundamentally undermines Bhutan's core values of Buddhism, respect for the monarchy, environmental stewardship, and national unity would be considered a "big no-no."