1. Making the lush green expanses dirty
2. Not being on time; Kerala locals are extremely punctual
3. Not carrying proper medicines and presciptions; You won't easily get medicines from med shops here without prescriptions
4. Getting excessively drunk, especially inside a houseboat
5. Not following safety precautions while taking part in adventure sports
6. Walking into someone's house wearing shoes
7. Spitting on roads
8. Going on night tourism to remote zones
9. Wearing improper shoes
10. Not carrying mosquito repellants