Maybe add something in tags/blocks in data, i think :)

It should work with modded fences by default. As long as they are based on a FenceBlock.
One way I can see it failing, is when they have some custom logic when the fence is "used" (r-clicked) and they not utilizing vanilla functionality.
I'll look into it.

The incompatible fence is refurbished_furniture:oak_lattice_fence from MrCrayfish's Furniture Mod: Refurbished. This could be helpful.