I was making a tech support call the other day and must have mis-dialed, because I ended up connecting to some "Free cruise" scam. The way these scams work, you get offered a free cruise only having to pay nominal "port fees". Once you pay those, you get forwarded to another agent who tries to have you pay for even more upgrades. If you actually try to go on the cruise, you will be told that you need to attend a number of time-share or other high-pressure sales presentations in order to get your boarding voucher.
Here's the call. I kept the guy on the phone for about 10 minutes before deciding that it was time to pull the plug: