The Worst Thing That Ever Happened to the Internet: is crap like this: http://realprograms.com/ I had them advertise on my site with Adwords... The worst scraper. Evar.
I agree 100% They are domain brokers normally,with 100s or 1000s of domains, and they stick this junk on them.
They are an unfortunate side effect of selling domains now. Makes many think they are going to a website when in fact it is nothing more than an advertisement for selling the domain. Allthough it seems like this is a bad practice or bad for the internet it is in actualality a good business practice for those wanting to sell their domains. It helps to show traffic patterns to potential buyers and creates a larger value for the owner of the domain.
It always makes me laugh when domain parked hostname has "Book mark this page!" on it. I wonder how many people actually do!