Before it gets to the cat picture point we created first a code of conduct and terms of service pop-up. Anybody who writes something on a site with a creative commons license you agree to not make these sort of comments. So when people post things like that we delete those 10% posts - usually just five words. Because it’s version controlled people could see the original if they want to. It is like Wikipedia. The normal people who join for the first time don’t have to have their mind polluted by that. Because trolls usually are from people who are just craving for attention. They have some gripe. So this is a way to teach people that only by making constructive criticism or constructive input do they get attention. Anything else automatically gets them zero attention.