So, just for the heck of it, over the course of the last few weeks, I've played 150 PVP2 games - not too many, but it'll suffice. Every single which of these games, I've started by saying "Good luck!" through in-game chat function.. And I've written down the responses, if any. A grand total of 114 people didn't reply at all, of which I can excuse 13 for being a farm, and 3 for desyncs.
Now, as far as the actual responses go.. Not a single one was properly capitalized, and the closest I've seen to proper punctuation was someone replying with a single period. The overall intention of the comments was alright though; with the exception of "die n00b" and "8====D suck it", they were all pretty sportsmanlike. As for the latter comment, that was the third time I beat him that night, and I'm sure the "Good luck" wishes got on his nerves by then. An actual overview of the replies I got:
I blame Kong.