tina: i can't be your friend because i saw a disturbing photo of you on social media. you were in a group photo with a person whose opinions i abhor.
dilbert: can you explain why that makes me a bad person?
tina: sure. duh. when you appear in photos with other people, you acquire their bad characteristics.
dilbert: i don't think that's how it works.
tina: that's exactly how it works! one photo with a jerk makes you a jerk! case closed!
dilbert taking selfie with Tina in background: smile.
tina upset: no-ooo!!!