According to filtering theory, when we decide to eliminate people because they use inappropriate turn-taking cues, or use unpleasant facial expressions and eye contact, which kind of filter are we using?

Interaction cues

Explanation:

Steve Duck's filtering model determines how people consider different cues in a particular sequence to know someone. He categorized these cues as Sociological or Incidental Cues, Pre-Interaction cues, Interaction cues, and Cognitive cues. Interaction cues takes place when people interact with each other, evaluate and then make decision to either include or exclude that person.

As per the question, non-verbal communication used to decide the interaction is an example of Interaction cue.