how to diable drag & drop / copy functionality for a particular column in excel sheet

Don't know if this will solve your problem, but it might give you a start

Put all of this code in the worksheet module for the sheet you want to control.
Right click the sheet tab and > View Code, paste the code in the resultant pane/window.

Option Explicit

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
    Dim isect As Range

    Set isect = Intersect(Target, Range("F:F"))

    If Not isect Is Nothing Then
        Application.CellDragAndDrop = False
    Else
        Application.CellDragAndDrop = True
    End If

End Sub

This should disable Drag & Drop in Column F, change that range to suit your needs

Hope this helps