Los Angeles has blown hundreds of thousands of taxpayers’ dollars on erecting hundreds of “no ICE” signs — which federal agents say they will ignore. City Hall splashed $250,000 on 450 notices at libraries, parks, transit hubs and public lots across the region as its war with the immigration officers escalates. But the city’s top federal prosecutor warned they hold no legal value and is a dramatic overreached from Mayor Karen Bass’s office . The signs have sprung up at popular sites such as Los Angeles Zoo, MacArthur Park and Lafayette Park in recent weeks and cost $500 each, though the council has not released an overall price amount. Each one is meant to send a clear warning to federal immigration agents that LA city property is off-limits for their operations. A growing clash is unfolding between Los Angeles city leaders and federal authorities over immigration enforcement.…