I viewed the pix of the dog and structurally, I saw dog. His paws seem to be narrow, dog-like, not wolf-like. However, in the face he resembles the wolf by his coloring and markings. Possible? Maybe way back in his heritage. Probable? Not to me. Could be a mix of several different breeds. You have a very llaid back husky at home, who could be at risk. Blindly buying or adopting a dog can bring terrible results. All info must be shared, and a decision should be made on integrating a new dog based upon your personal observation of the "new" animal.
To answer your Question, PLEASE listen to those of us who know the answer. YES, wolf hybrids are dangerous, as they are wild animals. Instinctively, they will always be a wolf. If you wish to pursue this discussion, I urge you to go directly to the heart of the matter; WOLF HYBRID RESCUE LEAGUES.
They will be thrilled to share information, education, and tell the truth to you. So many end up PTS, (put to sleep due to owner surrender, or go to a Rescue for rehabilitation (to a point) and many live out their lives behind chain link fences.
BAD IDEA all the way 'round..... There are millions of regular, real, 100% dogs that need a home as we speak. I have a thought. For the dog in question, have the owners submit a Vet assessment that he is a wolf hybrid. If indeed, pass him up, but suggest to the people that he go to a Rescue League for Hybrids.
If there is no wolf in him, find out WHY he is offered for FREE over the INTERNET! (Makes me angry)...Certainly a home visit to the prospective adopter is out of the question, so that leaves the dog with an "iffy" new home. I think he is a GORGEOUS animal, whatever his heritage.
Remember, buyer beware. In this case, you should definitely look this "gift wolf" in the mouth!!