What is poaching, you ask?

Person 1 posts the thread "ISO Shako"
Person 2 replies to the thread saying that he has a Shako FT.
Person 3 replies to the thread saying that he is interested in Person 2's Shako, and either makes an offer or leaves his account.

Person 3 is poaching. If you want a Shako, make your own thread where you don't have to steal another person's trade. It's just common sense trading etiquette.