I'd like to raise that:

- If a future administration ever has the political power to implement totalitarianism, we're stuffed. The lack of an existing mass surveillance system will not stop them as they will build one.

- Most people's political leanings are already very easy to detect due to social media, social networks, financial donations, etc. So balloons don't seem to make it much worse.

- We can expect severe security threats in the future as WMDs become cheaper, more accessible and more powerful.. The police are not magicians - they need effective tools..