Why would the moderators allow a response like “Stupid question. Get a life?” What possible justification could there be for allowing that? It’s simply an insult.
That said, I doubt the patterns themselves have a meaning.
Black knitted kippas are interesting because they are found among all segments, from non-Orthodox to Charedi (even if velvet is the most common among the latter).
People should wear whatever they prefer. Very small ones should be avoided because there is an opinion that it should be identifiable as a headcovering from all angles.