If you fly in an area of thick grass, you will have less chance of damage using streamers. I did the same thing with my Sprint for visibility reasons. It doesn't need such a long streamer, but I packed in the longest crepe streamer I could fit more for visibility than to slow it down.

If you fly on hard surfaces, streamers will often cause impact damage. Then again, unless it's totally calm, parachutes will drag rockets across pavement and cause damage too. Pick your poison if you launch near hard surfaces.