Personally I think domain trademark infringement is getting way out of hand. SwapNames.com was just one letter off the spelling of SnapNames.com. I can understand SnapNames' position in that case.
As I understand the law of domain infringement, the names has to be so similar as to cause confusion to the end consumer resulting in possible harm to the trademark holder's business. My domains listed on this thread may be borderline, but I personally don't think they cross trademark infringement line.
My domains have "DN" or "Domain" plus "Drop" in the spelling of each domain. And not the word "Names". I really think, if I were served notice from a company like SnapNames.com for these particular domains, I may very well go all the way to court. I may not win, but at least I would have the satisfaction of knowing I tried. Seems to me too many major online companies want to own their perspective industry all to themselves and have as few competitors as possible these days. They can easily, and so often do, intimidate a small company that is without adequate funds for defense.