When every time people feel the need to use images to support the written message they are trying to convey, they will - without fail* - infringe someone’s copyrights.
*The only exceptions to this rule that I am able to observe take place in:
1. Cases where the written message goes out to the outside world, which could leave the messenger legally exposed.
2. Cases where the messenger objects to copyright to an extent that they prefer to wage war on it by utilising material licensed under Creative Commons licences.
Image by Sam Teigen, Creative Commons (CC BY-NC-SA 2.0) licence