I have lots of bins, both indoors and out.
Salt: would have the same effect as pouring salt on a slug..:(
Lots of oil: will coat their skin and they could not breathe
Dairy and meat can smell really bad as it decomposes. I do not put either in my indoor bins. I do a lot of classroom event presentaions and they are very hands on and in my bins. As these systems are not "hot" composting systems I do not want to run the risk of kids/adults handling partially decomposed meat. (I do not have left over meat much anyway, as I have cats and dogs in line ahead of the worms:)) Indoors, in more shallow bins than the outdoor ones, I think the meat and dairy would cause nasty smells and attract unwanted marauders.
All the other things you listed are just fine for a bin with worms.

I don't think foods "cooked" with salt would be a problem. Very salty things might cause problems, but the small amount of salt that is in, say vegetables or pasta cooked in salted water shouldn't be an issue -- I've certainly never seen any problems with it in my bins. Ditto with oils in small amounts (i.e., the amount of butter clinging to the leftover green beans, or dressing on the remains of the salad). Dairy and meat are best avoided, for the reasons you give, though again, I don't obsess about small amounts, like the parmesan on the leftover pasta. Cooked beans, citrus, hard fruit peels, corncobs and coffee grounds have never caused any problems for me, though obviously the "harder" something is, the longer it'll take to break down (only avocado seed have proven impervious to the bin, but I guess they really fall into the next category). Seeds are best avoided to the extent possible -- they don't break down, and promptly sprout when I use the vermicompost, but there's little way to avoid the occasional tomato, cucumber & squash seed if you're looking to use the system to compost your kitchen waste. So I just weed out the volunteers.

What about carrots? I recently started juicing again and juice 8 carrots in the morning. This can produce a lot of crucsed carrots over the period of a week and maybe the worms just couldn't keep up, but the bin got a little stinky. They do fine with the yam and apple leftovers though.

i now have a 5 gallon bucket outside the kitch door and will just put most of the carrots in the garden.