Susan thinks she's going to enforce a limit on how many words a person can speak to her per conversation. There's just too many she's got to listen to and half of them aren't necessary. This rule is applicable to many of her relationships but she's thinking of a few specific people.

Often she just walks away.

Susan doesn't need to hear extraneous details or listen to the conversator make their point more than once or provide a political opinion or speak on a topic with which they are unfamilar. It's obvious.
Don't make sh*t up and don't brag.
OMG, don't brag.
You will be evicerated.

Recently Susan was present while two co-workers were having a discussion involving space men vacationing on planet earth and a government cover up. Susan recommended that they continue the conversation in private because they sounded f*cking insane.