Anti Needhambikes vandalism

Within the last couple of weeks returning from a ride, I noticed that one of the share the road signs (inbound on South just after crossing Chestnut had been spray painted with gray paint taking out the "share the road" message. I thought that perhaps this was an isloated event. A few days later I noticed that same thing had happened to a NeedhamBikes sign on Harris (near Great Plain) same spray paint. This was no isloated event, someone purposely went around to deface these signs, anti cyclist backlash? A motorist who does not want to share the road?.....