In response to alt-Right members who are placing "cowbells" around Jewish names. [See: (((The Jewish Cowbell))): Unpacking a Gross New Meme From the Alt-Right], it appears some Jews (and Jewish sympathizers?) are self-identifying themselves with cowbells.
On my twitter feed, I have noticed that both Megan McArdle and Alex Nowrasteh have put cowbells around their twitter names.
McArdle, of course, isn't a Jewish sounding name, perhaps the Ron Paul-hating, beltarian is half-Jewish or maybe just a sympathizer. Nowrasteh, who does good research, has a Persian father.