Welcome!!! It would not harm your Floribunda if you chose to prune off intruding (into the path) shoots. However, here is another possibility: You could get either wooden stakes or metal/plastic/bamboo strips, and drive them into the bed, placing three or more around the rose, and then using innocuous coloured twine, jute rope, chicken wire, etc., you could "fence them in" so they do not intrude, and trussing them up a little as mentioned, makes them more compact, enhancing the bloom display by bunching it, rather than loping off a number of fruiting canes. Just a thought. I have done same numerous times and still do. Just take a second and think it out in your head as to how it would look with the materials you choose. Cheers!