The OP on this parenting thread expressed annoyance that people were coming into her home with their shoes on. Somebody offered the obvious reply:
"Just kindly ask them to take their shoes off. They can't read your mind. No need to get so upset, just tell them to please take their shoes off."
A lot of people unnecessarily agonize about this subject. They need to stop getting angry and annoyed and just politely ask for shoes-off. They need less of the passive-aggression and more assertion.