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

"In St Andrews, it's important to avoid referring to the United Kingdom as England, as this can be seen as disrespectful to Scottish identity. It's also considered impolite to mimic or mock the Scottish accent. When visiting the many historic sites and landmarks, be respectful and don't touch or climb on structures unless it's permitted. If you're visiting a pub, remember that it's customary to buy a round of drinks for everyone in your group when it's your turn. Don't bring up sensitive topics like religion or politics, especially the issue of Scottish independence, unless you're well-informed and the conversation naturally goes there. Lastly, remember that in Scotland, including St Andrews, the legal drinking age is 18, not 21 like in some countries," mentioned another expat when asked about moving to St Andrews, Scotland.