Is a grand total of 6 trolling messages in a week statistically significant in the first place? The number I'm missing is how many legitimate prospect interact

Is a grand total of 6 trolling messages in a week statistically significant in the first place? The number I'm missing is how many legitimate prospect interactions resulted from each avatar. It wouldn't surprise me if the rude/harassing messages came from utter trolls who were not useful user prospects in the first place. If so, it could be worth keeping Rachel around just as a high-level troll trap to weed out the time wasters.