but quickscoping isn't an exploit *puts on flame suit*

Very well put and completely agree,

Only people that will disagree will be the other exploiters, sorry quickscopers.

The difference is that QSing an approved tactic much like drop shotting.  They even put in a perk just to make it easier to do.  With the small maps in MW3, I can actually understand why they did it just because there really aren't that many long lines of sight to use a snipe rifle properly and if they took them out of MW3 then the snipers would be upset.  Also, there is no ban for spawn killing just spawn trapping and that is just to discourage people from doing it for the better enjoyment of the game for all.  Although, I can't say that I've seen all that many people getting banned for spawn trapping either.  It tends to break down on it's own when someone gets too agressive and flips the spawn.  I wouldn't miss QS if it were gone but there's lots of things that I wouldn't miss.  However, the game isn't built around just one type of playstyle.  It's a game of strategy and you have to learn to adapt.  I can gaurentee that BO2 will have a few changes in it that will cause everyone to rethink their gameplay once again.  It's part of what keeps the game fresh even though it's also part of what rubs us the wrong way sometimes.

Is spawn trapping actually banable?  Thats a real laugh seeing as though it could easily be fixed by Infinty Ward by giving a few seconds of spawn protection like most online shooters have.  Also when you say spawn trapping ruins the game I could also say that when I flank a sniper and he turns around and auto aim locks onto me and he pulls the trigger before I even ADS.  The fact that someone who is tactically outplayed is able to use an exploit to their advantage is absurd. 

     Also in order to actually get spawned trap you would have to be incredibly out performed in nearly every way.  I've played allot of  Demolition and domination and I have never been spawn trapped in games where I've played the whole round.  In fact I've only joined 1 actual spawn traps in which there were 2 low levels playing splitscreen with more than 100 deaths.

think you got mixed up there.... spawn trapping is allowed.  That's when you hold in such a way that you force your enemy to spawn in a particular part of the map.  Like B and C on Interchange will force the other team to spawn by A the whole time, unless one of the team goes too far into the enemy spawn and causes a flip.  Spawn killing is where you're team manipulate the spawns so that the enemy team can only spawn in a certain point beside their objective while one of the team can be sat there in the spawn killing them as they spawn in... that is a bannable offence