I personally dislike bollards. I'm also frequently towing a trailer, and find them to be terrifying. There is a bridge just east of town with such narrow bollards that I'm not sure one could get a bike with full panniers through. A bike trailer would have to be lifted over.

In this case, however, the advantage would be that it might disrupt the vehicle from doing a straight path down several blocks of pathway.

Here in Eugene, we have a greenway that is several miles long. Once one entered, then one should be uninterrupted for miles. With flat-free tires, one could do a significant amount of mayhem until the vehicle was physically stopped.

Of course, a lower cyclist density than NY.