We have "Eleanore Roosevelt Roses": Multiflora. They suck, except for an hour or two in the spring when they bloom. Just a dense tangle of exceptionally thorny, meandering shoots. Great for bird nests, though. Allowed to grow, they will form a clump 2 ft. wide at the root base, 10' wide and over 10' high. To eradicate them with resorting to herbicides (we're entirely pesticide/herbicide free here, and have been since 1949), I bought a recip saw pruning attachment and two shaft extenders for my Ryobi weed whacker. Wait until it blooms, putting all of its stored energy into flowing. Slip that saw in at ground level and slice the whole f'n thing right off. No sticker pricks, nothing. Haul it out into the open and much it with the sickle bar or chain saw or just let it dry and burn it. It might put out shoots again at the stump, depending on the weather, but cut them off at ground level right after bloom and it will die...dead.