Okay guys, gals, regulars, and newbies alike. Here's a guide on getting one of the most notorious of all achievements: Invisibility.
1) It MUST be in the Chatterbox. Not the Achievement Forum, not the Extended Discussion Forum, put it in CHATTERBOX.
2) Do not put that you are going for the Invisibility Achievement. People will purposely ruin it. I've been able to make 3 or 4 threads that have gone unnoticed within the past week, so follow the next few steps and you should be fine.
3) Don't make an interesting topic that warrants a response. No games, giveaways, dice rolls, polls, or anything that will make it stand out and be noticable. Topics that even sound interesting will have some looky-loos and will make them want to post.
4) Don't make a topic so bland it's obvious what you're doing. Example: Your topic is only an apostrophe, as well as your message. This is just WAITING to be trolled, especially in the CB.
5) People on the CB tend to not want to read. (aka TL,DR. Too Lazy, Didn't Read) Posting something that looks like it might involve some big long story not worth their time will usually go unnoticed.
6) Time of day is also important. Your best bets are early in the morning U.S. Time, or late afternoon-early evening time U.S time. People in the morning make posts to kill time, and people int he evening have such a high volume of posting, sometimes your topic will slip through the cracks.
7) Make multiple topics. Don't bank on just one. Make a topic to keep the trolls occupied, then make another and hope it gets through. Keep trying until it seems you have succeeded. Most topics that don't recieve a post after 1 hour usually are successfully unnoticed.
Follow these steps and you're sure to get that legendary Invisibility achievement!
Other ideas that have worked so far:
1) "ATTN: Matsuni" Threads have been working pretty well.
2) "Under Construction" seems to have some success as well.
3) Big walls of text have seen fair progress as well.
4) Stuff so random know one rememebers it anymore. Like "My Little Pony."
Let me know what else works for you!