But I really don't think it's that big of a deal, and some people are overreacting a bit.
This is what I was saying about GG doing more harm than people think. Certainly, it seems as if people are overreacting about it, but until you are in the position of some of these people you might not fully understand...
...Sadly, it's not really possible to give you an understanding of what it's like for a "good" player. (or at least someone who thinks they're good, that's the real requirement.) People often underestimate these types of things. A common thing people underestimate still is depression and what it's really like. (I haven't personally experienced true depression (Not the fake stuff where people just think they are depressed.) first hand myself, but I'm well aware of biologically what it is. It is literally impossible to "get over it" just by snapping your fingers, and to an extent, this is no different. It doesn't matter how thick your skin is, enough little things will eventually make a hole.)
In this particular case, human instinct tells people to be the best at something. Some people fight this instinct better than others, and some people pursue this in different places. Some people, like myself, get competitive in gaming because of it, even if we don't truly
want to have any fame for it. The moment you start letting your ego inflate even the slightest bit; the moment you let yourself truly believe you're good at what you do; the more those GG's really hit you, and they'll hit harder as you believe you're better and better. People naturally feel as if someone has challenged their ability, something they truly believed in, and when you're a spectator...you can't fight back to show them otherwise. It's over already. You sit there helplessly as your mind keeps insisting you show them who's boss, and upon realization you can do nothing you become frustrated. "If only I had done this, that'd have shown him! Yeah!" What we really are frustrated about is that there is another person out there who probably underestimated our skill, and we care.
The reason people strive to be good at something like that probably would have had to do with survival before we were smart enough to build huge complex shelters, lightbulbs, refrigerators etc...Nowadays, it's abused in games and the like to keep people hooked, and sadly it also causes this trap. (Competitive natures still have lots of good effects, but these are among the traps that also lie in it.)
This is why after MCSG, I've been striving to play games more casually. Certainly, my competitive side comes out sometimes, but I suppress it much better now than I used to. The reason you probably don't understand the frustration over it is because you haven't really ever yet been compelled to play games in a competitive mindset. If I have any advice for you, it's to stay that way, it's probably better not to get competitive, unless of course you believe you won't fall into these same traps. (There are some amazing people out there who aren't effected by all of this, but the good majority of us fall into this trap. It's the reason online gaming communities are famed for being so bad, mostly, and especially, the competitive ones.)
Despite all of this, I'm firmly in the mindset that GG shouldn't be a bannable phrase, because it is said with good intentions in mind from time to time and ignorance to it's ill depiction shouldn't deserve a ban, unless explicitly stated in the rules (that most players won't read. >.>). Blocking the word doesn't sound like a bad idea to me, but I would sincerely hope people wouldn't blow that out of proportion just because they said it from time to time.