Posted: 13/10/2013 at 11:45
Generally speaking, the more you cut a plant down, the more it tries to grow back to where it was. If you just tinker around with roses they just make little sprouty shoots at the top. So your rose is now going to be saying to itself "hang on, I should be 6 feet tall" and it's going to try to get there next year. Rugosa roses can easily put on 3 feet a year if they feel like it.
Now that it's had a good shock it won't need another one next autumn but it will needto be kept a nice shape. Your neighbour clearly has the idea that this is her job. She is going to need to be put straight on that and watched like a hawk for ever more. Snipping is a habit that some people just can't stop themselves from doing.