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

"In Lucerne, it is considered rude to be late for any appointment, whether it's a business meeting or a casual get-together. Swiss people value punctuality and consider it a sign of respect. Avoid discussing personal matters, such as income, religion, or political views, in public or with people you've just met. Swiss people are generally private and prefer to keep such topics within their close circle of friends and family. Do not litter or make loud noises in public places. The Swiss take pride in their clean and peaceful environment, and any disruption is frowned upon. When dining, remember to keep your hands on the table (but not your elbows), and only start eating when everyone else has started. Leaving food on your plate may be seen as wasteful, so only take what you can finish. In Switzerland, it's customary to greet people with three kisses on the cheeks, starting with the right. However, this is usually reserved for close friends and family. A firm handshake with eye contact is the standard greeting in a formal or business setting. Avoid wearing revealing or flashy clothing, as the Swiss tend to dress modestly and conservatively. Lastly, remember to respect the local customs and traditions, and always ask before taking photos of people or private property," said another expat in Lucerne, Switzerland.