This is the second time this has happened and both times I researched the name through Network Solutions. Seems to me that netsol is tracking requests for available domains and if they are not immediately purchased, they are sold to these parkers at sedo. A new low in my book.
Advice to webmasters: don't search through network solutions and if you have a good domain that's available, buy it up immediately. There are vultures lurking.
If not, maybe there should be.
There would still be violations, but at least the biggest players would probably play by the rules. (But only by the very letter of them.)
That said, I think you explained what happened in your first sentence:
in a very active segment