Libraries are not a federally governed operation. Teach them to call 911 when it happens. It should be up to the library owners if they want to provide the service with the funds they have. Another concern would be if they become repositories for opioid drugs then theft vandalism may follow along with them becoming full of all the addicts. Where better to get high than in a place where if it goes too far someone can bring you back. Far from a place of learning.