In Norway we have this failed campaign for bicycle safety. On some roads there are big signs with "share the road" and the picture of a cyclist looking behind as he's overtaken by a car [0]. The intention was to "humanize" the cyclist and make cars behave, but instead the cars see the sign as "cyclists should look behind and let us pass!" or "he should cycle on the curb!" and instead increase the rage they feel when getting slowed down..
[0]: https://imgur.com/a/KSLAFzl