Okay, so we have frustration being adequately expressed by four letter words -- how about friendship, love, admiration, joy, etc. etc? Are they best expressed in four lette words as well?
> Are they best expressed in four lette words as well?
Generally, no. Expletives are typically most effective I find when used to either denote some unpleasantness... or as a modifier to denote "powerfully emotionally affective and shocking extreme."
I *dare* anyone to come to Utah in June, camp out near Thiokol, and watch the planned RSRM static test and *not* use words akin to those I used: "Holy Shi..."
But for negative situations, nothing sums things up quite as succinctly as a simple four-letter muttering - or yell. Imagine Kerry had won the election. What, no expletives? Be honest...