Blackberry findings.... possible project 3 progress?

While searching for leaves and flowers to include in my final project, I came across a ton of blackberry vines that seemed to have spread like wildfire all through the woods in our backyard. They were everywhere- around the fences, trees, the lake, on the ground....just everywhere. After finding these and harvesting for an hour or so, I almost was tempted to include these blackberries or their vines (super thorny!) in my final piece. Any thoughts??