You're assuming accidential collision. Images can be generated that intentionally trigger the hash algorithm while they still appear as something else (a meme,

You're assuming accidential collision. Images can be generated that intentionally trigger the hash algorithm while they still appear as something else (a meme, funny photo, etc.) to a person looking at them. This brings many possibilities for "bad people" to do to people they hate (like an alternative to swatting etc.)