Most people pay into unemployment, it is not a freebie.Same thing goes for unemployment; if your on the peoples dime then you should be required to take mandatory drug screening..
You'd have to do it for most job positions anyway.
If your willing or demand assistance and you allow the state to intervene in your affairs then you should be prepared to give up some privacy.
Road upkeep is paid by the state, does that allow them to regulate your hotdog intake? Force you to support (or be anti) gay marriage? Require you to join the military?