'Dolls' or the more commonly used term 'poppets' are used in all forms of witchcraft.
Thanks to movies and tv shows, most people associate them with black magick and voodoo which is a huge misconception.

Poppets are often used as an aid in sympathetic magick and can be used for positive outcomes, especially for healing and protection (I use poppets in my practice, tho I am not wiccan andI do not ascribe to the threefold (or tenfold) law).

I find it frustrating that the use of poppets/dolls are associated with something negative. I have a poppet beside my front door as part of a protection spell and I also have one for prosperity on my altar.

Yes, they can be used negatively but there is so much more to them.
Think of corn dolls and Brigid dolls that are made at Imbolc, same idea and certainly not 'evil'. There's quite a bit of info out there in Internet land which may answer your questions more fully.