I sawed down a rosebush 3 week ago to a stump as it was in the way and i hate the thorns; Blimey, it's already grown back to 2 feet high and has 5 roses.
Call me weird, but i like dandelions 'dent de lion' more than many 'real' flowers; the deep pretty yellow petals, the soft wispy 'clocks', the lionstooth shape of the leaves, the fact that the milk in the stem is medicinal, and where would burdock without its dandelion? So if i encourage them to grow in certain parts of my garden by helping disperse the seed, even at the expense of those nasty sharp pointy thorned boring rose bushes, and trim them back from other areas, then surely the rose is the weed here and not my dandelions.