Customs officers everywhere have almost unlimited discretion to deny entry.
While I think the Vance meme reflects very poorly on my country, it is always advisable to remember that you have very limited rights in every country while crossing the border and that it best not to piss off the officers. Travel StackExchange is filled with Q&A’s about how to what to do when the customs officials of various rich countries apply their discretion to deny entry, often for reasons even more petty than having a meme.
While I think the Vance meme reflects very poorly on my country, it is always advisable to remember that you have very limited rights in every country while crossing the border and that it best not to piss off the officers. Travel StackExchange is filled with Q&A’s about how to what to do when the customs officials of various rich countries apply their discretion to deny entry, often for reasons even more petty than having a meme.