Misparse; you're reading "artwork that (doesn't include horned creatures) [and] (that might offend)", but it's intended as "artwork that (doesn't include (horned creatures that might offend))".

thanks

I read it as the author wanting to still display some sort of badge to credit the hotspot as being powered by freebsd but without the possibility of offending the customers...

For example, one of the old badges without bestie the mascot. http://www.antbomb.com/sources/powered_by_freebsd.gif

I think it was intended like this: that doesn't include "horned creatures that might offend the ignorant or superstitious"?