Off the top of my head (reaches up)

Circus peanuts

Boston baked beans

Bag of pennies

Those orange and black wrapped candy thingies with no wording on them (shady)

fruit (apples with razor blades, etc.)

More to come... what are yours?

PS - Smarties were the poor man's Sweet Tarts. 

"Harry, I'm going to let you in on a little secret. Every day, once a day, give yourself a present. Don't plan it, don't wait for it, just let it happen. Could be a new shirt at the men's store, a catnap in your office chair, or two cups of good, hot, black coffee. Like this."  -Dale Cooper

Walnuts

Packets of instant oatmeal

Toothbrushes

Bit-o-Honeys

And I second the motion on the orange and black wrapped taffies. They're peanut butter taffy and they're so completely nefarious, they should be outlawed.

~ Amanda

"Just fear me, love me, do as I say and I will be your slave..."

~ Amanda

"Just fear me, love me, do as I say and I will be your slave..."

~ Amanda

"Just fear me, love me, do as I say and I will be your slave..."

Popcorn balls in Saran wrap

Graham crackers without chocolate on them, just plain

One old lady would demand a trick before you got any candy.  I was always stumped.

Ditto Pencils,

from a different house, erasers.

Also, bag of stupid plastic spider rings.  If I don't want one, why would I want 15?

 Granola Bar (now would be ok, but as a 9 year old??)

Necco Wafers 

Can we please hear more about the baked beans story?  Was this someone who  just totally forgot it was Halloween, and just searched their pantry for any random canned food? 

"Harry, I'm going to let you in on a little secret. Every day, once a day, give yourself a present. Don't plan it, don't wait for it, just let it happen. Could be a new shirt at the men's store, a catnap in your office chair, or two cups of good, hot, black coffee. Like this."  -Dale Cooper

No shit, this old woman was handing out little boxes of laundry detergent powder one year.  Just like in Grumpy Old Men--when he has nothing and throws a stapler and some Tide or something into the bag.

Toothbrush

Those black and orange peanut butter things--my dad loved those nasty little buggers.

I, too, have gotten the little instant oatmeal packets.

Candy corn. BLEH!

Religious tracts.  Not even the cartoon kind.

-cg

Did you know that the razor blades in apples was a myth? Ok, it happened a few times, but it was never strangers. Just fucked up family members.

Stale Tootsie Rolls is another bad one.