Basically, it turns out that it means attackers crowding the zone to get the points and win the round, for example after an attacker has broken defense and cut the zone in half so to speak, another attacker(s) come in and capture the zone.
When asking the people who scream "bah, gankers", "omg ganked", "ganktastic", etc, they dont have a reason behind their "argument" as to me, they just see it as another way to complain to try and piss people off or hope that people wont do it to them in the future so they win.
How I see things is, its a team game - to win for the team, you need to either kill everyone on the other team or capture the zone. Now to me it seems the easiest and generally fastest way is to capture the zone - so what is the problem in crowding a zone so your team wins?
I just dont get it. Plus, Whats the betting the moaners even "gank" the opponents defense in important matches such as AFL, ladles or clan wars...

Rant mode over.