What is your opinion on roadside memorials ?

I recall years ago when I lived in a different state, a local radio talk show host would often comment of his severe dislike for them, specially the ones with flower bouquets,balloons,cards and stuffed toys and would often advice his listeners,if they were to come across one to take it apart and bring it to the radio station for a prize. (T-shirt,concert tix,etc,,etc,)
*I always though:if I were to see someone taking apart a roadside memorial,I had set up in memory of a loved one,his/her family would end up erecting an additional memorial in their honor right next to the one,they were dismantling.

A friend’s mother often comments of how she believes they are absolutely unnecessary & unsightly !
Why would anyone get upset about them as long as they are not placed on their property ?