What cultural faux pas should I try to avoid making in San Ignacio?

"It is important to be respectful of local customs and traditions when visiting San Ignacio. It is important to dress modestly and to avoid public displays of affection. It is also important to be aware of local religious beliefs and to be respectful of religious sites. Additionally, it is important to be aware of local taboos and to avoid discussing sensitive topics such as politics or religion. Finally, it is important to be respectful of the environment and to avoid littering or damaging the natural environment," remarked another expat in San Ignacio, Belize.

What cultural faux pas should I try to avoid making in San Ignacio?