I hope many of us use DP spy on regular basis and no doubt thats cool tool; What i do is that my DP spy is a part of my home pages in my Fire Fox its always working. I dont want a page to be opened in that tab anyway so always i open a seprate tab to view any thread that seems interesting to me; what if we have by default such option that always a thread is opened in new window or it may be provided as an option to individual user like there is an option of 'only subscribed threads';
You know you can just shift-click a link and it will open in a new window, right? If you force everything to open in a window, there's no key option to have it *not*. So defaulting to not opening in a new window really gives users the option of doing it either way.