Laughing at the "tamper evident sticker" suggestion. Not at the poster, but at how far we have come as travelers and COVID that some would feel one of the following

• ewww, who knows where have these been,
• WAIT you didnt let ME see the sticker while it was still sealed

...rather than just enjoy someone's celebration. I miss those days!

Honestly don't worry about precautions; if someone is gonna be uptight no possible precaution you might take is going to make them feel "safe"