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

"When visiting Pula, it's important to respect the local customs and traditions to avoid any cultural faux pas. Avoid discussing sensitive topics such as the Yugoslav Wars and the breakup of Yugoslavia. These are still sensitive subjects for many Croatians and it's best to steer clear of them unless initiated by a local. Do not make negative comments about the country or compare it to other former Yugoslav countries. Croatians are proud of their heritage and may take offense to such remarks. Avoid being overly loud or boisterous in public places. Croatians value modesty and respect for others, so try to keep your voice down and avoid drawing unnecessary attention to yourself. Do not disrespect the Catholic Church or its practices. A large portion of the population in Croatia is Catholic and they take their faith very seriously. Avoid wearing revealing clothing in religious sites. When visiting churches or other religious sites, it's important to dress modestly out of respect for the local customs. Do not leave a mess behind when visiting the beach or any other natural sites. Croatians take great pride in their country's natural beauty and expect visitors to do the same. Avoid being late for appointments or meetings. Punctuality is highly valued in Croatian culture. Do not ignore the local language. Even though many Croatians speak English, they appreciate it when visitors make an effort to learn a few basic phrases in Croatian. Avoid tipping too little or not at all in restaurants. While tipping is not mandatory in Croatia, it is customary to leave a tip of around 10% if you are satisfied with the service. Do not refuse food or drink when offered by a host. It's considered rude to decline an offer of food or drink, especially when visiting someone's home," remarked another expat in Pula, Croatia.