Banning nipples makes a clear and easy line. If they didn't have the line there, where would it be? Nudity? erect penises? Hardcore? Logistically they need a line on how they moderate pictures.
Text/groups on the other hand, is just text. Personally, I don't really find text offensive unless it's directed at me or my family, in a threatening way - eg "We're going to hunt axod down and skin him like a fish". If it's just idiots ranting on about how they hate some group of people, trying to ban or moderate that only draws attention to them.
Banning nipples makes a clear and easy line. If they didn't have the line there, where would it be? Nudity? erect penises? Hardcore? Logistically they need a line on how they moderate pictures.
Text/groups on the other hand, is just text. Personally, I don't really find text offensive unless it's directed at me or my family, in a threatening way - eg "We're going to hunt axod down and skin him like a fish". If it's just idiots ranting on about how they hate some group of people, trying to ban or moderate that only draws attention to them.