How to Catch an Expiring Domain Name—Case Study & Tutorial—Review of Domain Catchers: "Should I, like the article's author, also sign up with other name catchers?
On the contrary. This is the counter-intuitive part. Perhaps Enom and Pool.com are better at catching domains, who knows. But, since they place all the names they catch on auction anyhow, there is no need to sign up with them!"
'via Blog this'
Eventually the companies who do this sort of thing, which is possibly bordering on illegal will choke on their own system as they kill a huge source of their income. Without domain speculators, the domain industry would evaporate faster than ether!