There are too many personnel problems with the Yahoo default listings to even try to mention them individually. Heck, though he's ranked last, Albert Bell is still on the list. 'Nuff said.
Let me make some general observations though. If you want to do well in a league, even if the others managers are casual (and I wouldn't be so fast to assume they all are), if for nothing but pride and learning I'd at least do the following:
1. Do some preparatory work. At a minimum, for each of the 9 basic positions, count the number in your league's format (eg, 5 OF), multiply by the number of managers (7 in this case), and make a list of *at least* that many players, individually ranked by you, for that position. Really, you should add in more players by looking at mixed positions (CI, MI, Utility and such), and also your reserve (bench) slots allowed, and add that into your equation. Eg, if you have 5 OF positions, but also a Utility and 5 bench slots, figure perhaps 6.5 for OF: 1 bench slot in case of OF injuries, and .5 as the likelihood you'll put an OF in the utility slot. So then your list needs, for OF, 6.5 times 7, or 46 players.
2. *Especially* for an autopick draft, rank all the players from all the lists you've made in the order you'd take em. This is easy for the first 10-30 slots... you probably know who you think are the best players in the draft, pure and simple. But after that, you need to look at all your position lists you've made and one by one choose the best from all those lists to put next after the first group you did. Otherwise, say you take the simple way out and just rank 10 or 20 players, then do your rankings by position. Whatever position you do first, let's say pitchers or OF, will end up filling your whole reserve (bench). Yeah, this is some work, but if you don't enjoy it, why play fantasy baseball?
3. Find a good, current online list of injury news (espn, usatoday, mlb, sportingnews all have them, among others). Read through the entire list, and note down all the players who are going to be out for a good while (perhaps anyone till June or longer? your choice). Then, for all the players on that list, if they show up on your finished Yahoo rankings (as far as your ranking went), either remove them from the list entirely (easiest and certainly for folks out all year) or put them beyond the end of your "indivually reranked" list... especially for those who are really good and may be healthy enough to contribute later in the season.
Not sure what adage to end with... "a word to the wise" or "advice is worth what you pay for it". Anyway, I'd say the above is a *minimum* of what you should do for your draft.
And to everyone else, I may have not post here much so far (only recently learned of the site, and I really like it), but I'm making up in post length for low number of posts. I like to help newbies out, the way I've been helped.