The message entitled "DNA Tribes, is this a joke?" is in poor taste and shows a sad lack of understanding of DNA analyses. In my case, I've had analysis done with DNA Tribes, Family Tree DNA's Population Finder and their myOrigins product (which are totally different), and I've done all the analyses with the multitude of calculators at GEDMatch.
If you're going to call one of them a "joke" then you might as well say that about them all, because they're all doing similar things. It's all based on statistics. In DNA Tribes case, however, they give the novice too much information with little explanation. But, at least they give you some information, FTDNA give you almost nothing but a a few overly general "heatmaps." D
T tells you upfront that tribal similarity and relationships does not denote direct ancestry, just that these are the populations in their database that are statistically shown to be correlated with your markers. But, it's still up to you to triangulate the information with genealogical and ancestral data. Admittedly, they do give you too much information, including a long list of populations in which your statistical relationship is null (i,e. zero similarity).
But, give them a break, and read their instructions carefully. They're not saying that these are your ancestors (genetics is too complicated for such a simple statement). This is emerging science and all the companies are breaking new ground moving forward. I'd recommend taking what they tell you, and adding what you and your family know, and have some fun with it as you try to make some sense of it all. It's a process, not a diagnosis like a medical test.