The more visibility the US's failure to house and assist those in need the better. Shame this nation into oblivion until it changes its ways.
People use drugs across all social classes. Those living on the streets just use them where it's visible for lack of alternatives. At least we have strong laws protecting filming/photographing any public activity where there's no reasonable expectation of privacy, so we can shine light on these societal failures until resources are allocated appropriately.
What's happening in this country's city streets should be embarrassing to all citizens. Through this particular lens the US looks like a failed state, such a dereliction of duties for a first-world nation.