Guys, seriously go to scar/targa now.

if Nexon fails to correct an obvious mistake like this in let's say...a week...then it should become fair game to all players, ESPECIALLY if Nexon says nothing about it (Because let's face it, even if they tried to use an excuse like "we didn't want all the players abusing this glitch"...after a week everyone who cares knows already).

This misses the absolutely critical fact that for all changes that require the WZ's get repacked Nexon America has to have Nexon Korea do the work.
As has been repeatedly discussed, Nexon America has no in house WZ developers. It's all done by a team in Korea that has to be sent the work and that team has to fit it into an existing release cycle. Unless something is absolutely game breaking make it unplayable they don't do emergency out of cycle WZ patches. In the past five years we've had at most two of those that I can recall.

As for not announcing it, despite what you think, a huge majority of Maplers have zero awareness of the various forums and think the Nexon forums are the end all be all and don't read anything that isn't published on the Nexon site. Actually a good chunk of those don't even read the forums and only read the Nexon announcements section, and there are even players who don't read anything at all. Pointing to an opening on their site and warning that it's a known glitch doesn't do them any good, it just gives it yet more publicity. How many people who were told bigfoot abuse would be punished on the nexon site actually stopped abusing it? How many went there anyway thinking they'd be safe?

There is no winning in the situation Nexon is in. They can't stop it because they don't have the manpower to sit on every map of every channel of every server 24/7 till it's done, they can't snap their fingers and fix it, they can't tell you not to do it without encouraging more people to exploit it and their inability to be everywhere at once. All they can do is fall back on their "We told you so" and punish people at random to make an example of them. It's not fair to Nexon. It's not fair to the players. It just proves that abuse screws over everyone, regardless.

Subject has been pretty well beaten to death now, RIP.