The police have limited resources. There's paperwork involved. We vote for these people. They're not going to frisk people for the heck of it. If there are any problems, you can bet that minority populations will be on top of this way before you are. Remember - these things aren't cast in stone. If there are issues, we will put pressure on the relevant politicians. This judicial diktat rams Judge Scheindlin's leftist viewpoints down New Yorker throats.
Your trust in government employees abiding by any sensible restrictions is misguided.