Ded has a valid point. Without fail it seems that those that advocate dweeb play are those that can't put up a good fight. But at the heart of it I believe it to be a chicken and egg thing. Does the inability to fight lead to the lame attitude or does the lame attitude lead to the inability to fight.
I've played long enough to witness several fresh nooblets develop into steely eyed killing machines. The thing they all seem to have in common is that they keep upping and head straight for the fight. They come right back at you despite being blown to digital bits. They value the fight over the kill or points. They don't like to gang, ho and receive no particular pleasure from defeating the clueless because to them only the hard won victory tastes sweet.
I've seen many players who become quite proficient at lame game play. The HO experts, the pick artists who are great shots and have become very proficient at exploiting even their own team mates to get cheap kills, the guy that can execute an extraordinarily accurate pork-auger run, and the ones that derive their self esteem from the accomplishments of the group. This leads me to believe that they are capable of developing real fighting skills but their luzer attitudes have lead them to develop luzer skills.
In conclusion, the ability doesn't create the attitude, the attitude creates the ability. The incessant arguments in the forums are really quite useless. The lame mindset is genetically ingrained and people do not change. Born a luzer always a luzer. If you knew these people outside of the game you would see that their personalities are quite consistent. These luzers are the ones that will seek wealth regardless of the means. They will be political back-stabbing do-nothing corporate types. They will be politicians, preachers, salesmen and assorted other forms of low life. They will be liberal minded whiners who think that they are owed a living and everything wrong in their life is someone else's fault. They will be the majority. And lastly they all seem to live in denial and share a profound lack of self awareness so, in short, they could be you........