I put mine up, but not as protection from people.
My 1st conv was an MR2 Spyder. Stopped at a parts store one afternoon. Wasn't going to be long and it had a manual top that I didn't want to take the time to put up as I was only going to be in the store 5 min. Came out and based on the deposit, some mamouth robin had pooed on my windshield post. So close to being a disaster.
And the robins in my neighborhood are no better. They strafe my driveway on practice runs, just waiting for the day when I leave Punkin out with her top down. Think I'm exagerating? Spring of 2012 I bought a silver Caymen S with the intention of reselling, so Carmen had to sit in the driveway as she was the odd man out. I was going to take her to work one morning and was surprised to find this:
They don't mess around. You give them a shot, they take it.