The sender there have more power over the result of the exchange, and respondent have a kind of passive role of reacting to the initial stimulus. The common courtesy is one thing known to almost everyone who cares but the sender's passive-agressiveness is hidden from their sight, as is the desire to pressure respondent for some kind of results. The respondents in a calm and charitable state of mind wouldn't normally overreact as much so they are either overworked or anxious which increases the threshold of picking the bad in seemingly common stuff.
It's impossible to change other random people nor alleviate their anxieties or tiredness. So it's on the sender to avoid that which I implied in the TS comment, which in itself is based on the article's examples.