Your article is self-contradictory. You offer more reasons why the boycott is a bad thing than a good thing. You point out that the boycotters are full of hyperbole and that hurts their case. And in your closer, you point out you didn't even buy the first Left 4 Dead so you're not even in the customer base that's supposedly offended.
This is the first op-ed I've seen that criticized a game company for re-using the same engine over and over, which is a fair criticism. Back in the 1990s, companies such as Sierra and SSI would use the same code to make "new" games, which they cranked out on a regular basis. Strangely, though, back then people actually enjoyed having new games to play ... and if they didn't want to play them, they simply didn't buy them.
The boycott is doomed to failure, by simple economics. If making Left 4 Dead 1 required 100% of the development resources, Left 4 Dead 2 will require less than 100%, or 100%-X. For the boycott to work, the expected X percent will have to be greater than the resources saved by recycled work. It won't. The boycott is largely meaningless because they only thing that will matter is sales, and if L4D2 has even just 80% of the sales of L4D1, it will be a resounding success.
If forum trollers really made a difference in marketing, Snakes on a Plane would've had a lot more revenue. Many folks who are throwing in with the boycott will swallow their pride and buy L4D2 anyway. (Wait, forum trollers have pride?)
Sigh, remember the days when John Romero was mocked for having his game take four years of development time? It used to be that gamers expected a franchise to spit out a new game every 14 months or so. How things have changed that folks feel necessary to boycott new content.
Speaking of remembering things, does anyone remember Half Life: Opposing Force? It had its own death-match option, incompatible with Half Life's. It was made by a different development team and was largely considered to be an inferior cash-in, unworthy of Valve's commitment to quality. Sound familiar? How much did that hurt HL's legacy? Not one iota.
Really, the L4D2 boycott is one of the worst things to happen to gaming. It's a message to developers that says they should inflate their development cycles to make games take longer and come out slower. It makes gamers sound like whiny elitists who want their "fun" strictly managed and parceled out in small bites made more palatable by two or three years' worth of screen-shots and puff-piece magazine articles -- you know, the fecund enviroment that let 3D Realms take 10 years to make the lame Prey, and to take 12 years to ... er, make nothing. It's a message that Valve could've done the same amount of work on L4D2 that they're doing now, but just postponed delivering it for three years, because apparently gamers want less things, less often.
No wonder video games have become conservative, bloated affairs ... biting off more than they can chew as they try to cram in sixty hours of game play to justify their $80 price tags. Apparently, it's because making smaller games with faster production gets a publicity backlash. The boycotters are in the same camp as folks who complain that folks who want to play a game for just 15 minutes are "casual gamers" who are "ruining the industry". Think it's too soon? Fine, don't buy it. But exhorting others to have less fun because it makes you sad? What kind of gamer does that?