In a large microwave-safe bowl, melt the white chocolate chips and the peanut butter in the microwave on medium heat for about 2 minutes, stirring after a minute, until melted and creamy. Do not overheat! Chocolate can scorch. Stir well again after second minute, until mixture is creamy and completely combined.
Add the shoestring potato chips, and gently fold in until completely coated.
Drop mixture by tablespoonfuls making tall mounds onto wax-paper lined baking sheet, and shape into tall haystacks.
Wrap a little licorice around top third of haystack for a tie.
Pop into refrigerator until chilled and firm.
Meanwhile, add one cup or so of coconut and 5 - 6 drops green food coloring into a small baggie, close, and shake until coconut is tinted green. Add more coloring if needed and shake again.
When haystacks have hardened, frost tops of cookies with chocolate frosting, sprinkle tops with tinted coconut "grass", add a little frosting to bottoms of haystacks and pumpkins, and gently stick on top. Tuck finished bat-shaped name tags onto tops of haystacks. (*If they won't stay nestled between the candied potato stick spikes, add a dab of frosting to the back to help them stick.) Alternatively, you can tape toothpicks to the backs, and insert them into the tops before chilling. (But they may be difficult to remove when kids go to eat them.)
Keep chilled until needed. Store any extras in an airtight container in the fridge.
Tips: Regular ol' white chocolate chips don't seem to want to melt well anymore, so be sure to purchase QUALITY chips to make this work and have no trouble. (Nestle is not recommended.)
Trace around cookie on parchment or waxed paper to know what size to make haystacks (with pumpkins), so that they aren't too big. Just draw around one, then make the rest approximately the same size and you'll be fine.