...If you've got a tight group of "friends"/readyroom/wardroom. Otherwise it sometimes just goes away because it's perceived as being "too cruel" or not "PC." (read: Lame excuse). From what I've seen on the Navy helo side, it's hit and miss. A lot of namebased callsigns and sometimes experienced based ones, but it's not like they have a naming party or whatever the jet guys do to get theirs. I've seen callsigns on orders, from time to time, as well.
It is fun to see someone hit their breaking point when they're called by their less than favorable callsign, especially when it's the Shoes that are calling them out.