No, it isn't. It's just something jackasses do to impress, well, a certain kind of people I guess..But bottom line, hitting any target at 2.84 miles is impressive.
And before you suggest that I or anyone else should do it, you need to come up with a way to rationally describe accomplishment in 'hitting any target' -eventually.
If I glue a dime to a fence post, walk back 600yds, and shoot until hitting it, are you then going to believe my gun is so accurate, and my shooting skills are so good, that I shoot dimes at 600yds?
Or, would you ask me why I glued a dime to a fence post?
It's a test.