I found out about it, after someone I know, who works at godaddy tries this practice. He's gotten some good names from this type of tactic. I also hear that ICANN will be cracking down on it soon, because it technically is unfair to other people.
Just buying a domain and checking the traffic, then asking the registrar to delete it = domain tasting. I hope it does get banned, because many domain name collectors/resellers use this tactic and take as many valuable domains as possible. So in the end your left waiting or have to pay them a ridiculious amount of money for it.