From a line battle perspective point blanking is an effective way of immediately removing a threat and throwing the balance squarely in your sides favor, if the officer led the charge at such a time that they are all sat there fully reloaded and capable of point blanking to begin with then it was a poorly timed charge and you are suffering the consequences.
You can throw the whole "its not honorable" crap around all day long, you are just bitter that you didn't get into melee where your endless hours of practice might have been decisive due to it being the primary area that individual skill applies (or might not, they may well be better at melee than you). At the end of the day, you're dead and they are free to run rampant in what remains of your line, anyone not taking that as an opportunity is tactically inept.
For public play sure it is annoying as hell, but this is public play what did you expect. If you aren't being TKd by poorly aimed British Rockets, endlessly run down by that one guy on a horse or shot from people hiding in bushes you aren't getting the "NW Public Experience™"