These domainers ping the domain registry constantly and scoop up domain names as soon as they are dropped. It's crooked and an unfair advantage the rest of us do not have.
I'm sure many of you will remember what was called "domain tasting". These domainers who are plugged in to the registry would register domains as soon as they dropped and hold them for a few days to see how much traffic they got. If they did not get enough traffic, they would drop the registration and not have to pay for the domain. I had no idea until just now that ICAAN had abolished this policy in the second half of 2009. According to CNET, domain deletions (scooping up a domain and releasing it without paying for it a short while later) have dropped by 99.7%.
I don't know why it took so many years to end an abusive practice. I can only imagine how many millions upon millions of dollars those crooked domainers made by engaging in that crooked practice.
If anything, an expired domain after its redemption period should be put up for auction so everyone has a fair chance at getting it, not just those who constantly ping the registry.