I don't think there is a club to be in, but if you want to feel in the club about such things, just say something like "I expect that there is an option for like '-w whatever_madeupoption' that is useful here, but I'd have to take a look at the man page or use '--help' to know for sure". Be prepared to respond to "how would that work?" with APIs/syscalls/etc that you might use to implement that or say something like "I'm not sure, it sounds like an interesting problem if I had time to solve it"