Anti-roosting spikes have been added beneath the County Hall in Abingdon.
The arcaded ground floor of the County Hall has been open to pigeons since being built in 1862, and being a building of great historical importance does need protection. Pigeons like nothing better than to defecate all over it.
I’m pretty sure the pigeons are just doing what comes naturally without giving any thought to it, and aren’t taking any particular enjoyment in the process.