I do this while playing Soviet too. As long as I use my time busy manually clicking for ghost wire, just buying opponent few second to shoot it down, what's wrong with it?
LMG42 can help, but a wise consspamer will avoid the LMG squad and riot somewhere else, or trying to brute force overrunning the LMG at all cost.
I think the best solution is MG bunker, and more S mines at choke, that the consspamer cannot do anything to it, and forcing him to invest a Zis, that will force him using the manpower instead of more cons.