In my opinion, an important point here is that any list of the "bottom ten" teams is sure to contain 2 or 3 (maybe even 4 or 5) really bettable teams, the kind that are good for several net wins per season. I'd even go so far as to say that any list you made of the 10 worst teams after, say, week 4 would win ATS the rest of the way. Face it, these are ugly teams, but that's where the value lies.
So, in inverse terms of my willingness to bet on them, I'd rank the bottom ten as:
10) Washington
9) Buffalo
8) Detroit (MNF at home vs elite team should tell a lot this week)
7) Seattle
6) Dallas (young team that won't give up, played a tough sched 1-2 ATS)
5) Arizona (lead league in yards per rush, 8th in yards per pass)
4) Cleveland
3) New England
2) NY Jets
1) Chicago
I like to designate one team each quarter of the season starting with week 5 that I just won't bet on, and one team that I just won't bet against. Doing that has shown me that lacking the will to play hard is much more telling than lacking talent. So I'd bet on any of these teams except Washington, maybe Buffalo. And I'd much rather bet on teams like Chicago and Carolina in the right spot than on teams like Tennessee that are ripe for a fall while still carrying a big rep.