I am more than happy to see benches scattered about the environment for people to use and to see memorial plates, but it is a uestion of how many. You can have too much of a good thing. When there are so many benches they stop people who do not want/need to use them from enjoying the amenity they are provided for, then there are too many.
We live opposite the town parish church. There is a foot path from near our house to the High Street the other side of the church yard, probably just over 100metres long. There are 4 benches along the length of the path and a couple have memorial plates. The benches are well used, but no one wantin a sit cannot find a seat. That seems a reasonable distribution of benches, part of the landscape, of use, but not obtrusive.
Were there to be 20 or 30 benches along this passage way, end to end, obstructing the flow of pedestrians and making it difficult to look at the little shops, either side of the path near the top end, that is too many.
The news items in the news media this week have shown just such situations, with many of the beenches decked with flowers, wreaths, teddy bears and photgraphs, that inhibit others from using the benches, then that too, is too much.