Feature request: Copy nodes by dragging & dropping while holding Ctrl

When I drag & drop a node and while holing the Ctrl key on the keyboard, the mouse pointer changes to a "not allowed" sign. What should that sign tell me?

If there is no function behind this yet, could you please let me copy the node(s) by doing so?



The copy option is sometimes difficult. I try to copy holding the ctrl but I get weird result. The items get copied again and again. broadcasting