1. That's not really my point. I'm saying that when a really good strategy evolves, you must adapt to it, not ban it. However, now that I think of it, goal-tending wasn't implemented until George Mikan abused it to the point where it is unfair. It is possible that some strategies may be insurmountable, but I don't think Hyrule camping has passed that point yet. At least not in any empirically evident way. No one has dominated in recent years by employing the strategy (inb4 someone says gerson... but no I don't think so. He loses games too often). Just because at the lower level it is tough to deal with doesn't mean it should be banned.
2. DEFENSE WINS CHAMPIONSHIPS. Ever heard of it? Of the past 9 NBA champions, I believe I can say without any disagreement from anyone that 3 of them were defensive minded teams. This years Heat (by all accounts of anyone in the NBA the best defensive team anyone has had in quite a while), the 2007-2008 Celtics, and the 2003-2004 Pistons. The Celtics and Pistons are what I would call "strictly defensive" as far as basketball goes, considering that you DO have to play offense when you have the ball. Going back further, the Jordan's Bulls, while the attention is often placed on Jordan's offensive abilities (NBA superstar hype at its finest), Jordan and Pippen were All-Defense and Pippen was maybe the best perimeter defender of all time. Before Jordan's bulls were the Pistons who repeated using a defensive philosophy. Stricly defensive can win in basketball.
In the NFL, there is no better example of defense prevailing than the Giants defeating the 2007-2008 Patriots who were then 18-0 to win the super bowl. The giants did the same last year, though admittedly with a better offense than in 2008, they won primarily due to their staunch defense. Combine that with the success of the steelers both in recent years and throughout history, as well as the Patriots of the early 2000's, which were driven by defense. Ravens in 2001, Bucs in 2003. These teams that are "strictly defensive" in that they are ineffective when they have the ball, have been successful in the NFL.
I don't follow baseball or soccer much, though I used to follow baseball. I know that some baseball teams will go either defense or offense--stacked pitching or stacked hitting. Both methods show success. This is probably the purest form of strictly defense in sports. Recent Houston Astros come to mind. Soccer, I don't really know because **** soccer, am I right guys? But I've heard of teams packing it in (spain?) and playing nothing but defense -> counterplay, I think..... I'm really not sure on that one tbh.
In conclusion, Defensive minded teams are as, if not more successful than their offensive counterparts. This post was longer than I anticipated