Although people have taken various shots at each other and what not, there have been quite a number of things that were correctly touched on. It might seem like a call out, but you cannot speak about the past without naming key individuals.
Some of the reasons people like to bring up this particular instance in the dark past of Zan every now and then is to not only analyze but use it as a means of public ousting. The majority of players probably do not want to see another occurrence of someone pretending to be the opposite gender. This has nothing to do with any of the transsexual issues or any identity crisis. What essentially happened was a grand scheme of deception, manipulation and often times humiliation. Just as Blitz(IcyMew) admitted to, more or less, he did it for attention, for laughs and to troll (such as the case of Soul). Sure, that time period may be regretted, but regret does not invalidate the past.
In other instances this deception and manipulation causes a lot of unnecessary drama. I'm sure the people involved in the Mere wars can recall the vast amount of instances of drama. This includes provocation between clans, people in power being influenced and being brought into said drama, players being stolen from clans and overall just a nasty set of situations that various people got sick of. It had gotten to the point where even staff was considering doing something about it. A giant headache that thankfully ended when the truth came out. Basically this is what happens when irc and under handed politics are played instead of the game.
Small example reading:
http://pastebin.com/GzMiScLt
Sure, there would not be any problem if this facade was all in jest. However, this wasn't the case of the intentions of Lilith. Admittedly by his own accord, his whole show was just for trolling and the side of affect of breaking up clans apart. SPAK
most definitely enjoyed the problems caused solely by the antics of Lilith (not really). Yeah, it may be SPAK, but no one really should have to deal with the poison of a person infiltrating a clan with the purpose of trouble. There probably will not be any apology from Lilith, considering he bragged about the whole thing on irc. I don't have anything personal against Stan. I'm simply stating what occurred.
Teletha really didn't cause as many issues as the previous three. Possibly due to the fact this act was exposued far before any type of 'female' influence would be inflicted on players. Regardless, nothing good has come out of guys pretending to be girls in this community. A lot of problems, drama, headaches, and shitty politics have resulted from such pretender acts. The worst part of it is when everything is going down, there is always a defense force and barrier of protection from players and even staff alike. Effects of this defense force can still be seen even in this topic. You wouldn't expect anyone to defend these guys considering some of the things they caused, but yet, whiteknights gonna white knight.
Unsurprisingly, once the curtain was lowered on the acts, each perpetrator fell off the radar hard. It would have been better for them if they had just been themselves. But unfortunately hindsight is only 20/20.
tl-dr: Pretenders have been proven to cause nothing but trouble and the only way to stop this behavior is to publicly call it out and discourage the behavior when it happens.
ps. People would get a kick out of the trouble REAL girls caused on ZD back in the day.