1.) Note the names of the offending directories, then delete existing Directories which you do not want, such as "Recycled" or "$RECYCLE.BIN" 2) Create a FILE by that name at the same level that the directory would then be created. (This usually at the root level of the Share.) 3) Make the FILE by that name Hidden and System (to help avoid questions from curious eyes). 4) Set ACL rights that limits the FILE rights to all but a few.
That should stop the creation of any directory for most situations.