Examples of passive defenses against surveillance:

• Privacy Badger
• uBlock Origin
• Using open source Linux rather than Microsoft Windows
• etc.

But why not actively combat surveillance instead of passively defending against it? Examples of active combat:

• AdNauseam
• ScareMail
• Emacs spook.el

We must poison the data of those who are violating our privacy. Let us waste their time, increase their data storage costs, and waste their processing power. Let them drown in an ocean of data. Let them search for tiny needles in huge haystacks, with no way to distinguish between needles and hay.

Some ideas:

• Sending fake data to Google Analytics (How does Google Analytics prevent fake data attacks against an entity's traffic?)
• Create fake contacts lists to mislead those who are building social network graphs.
• Encrypt lots of worthless data, store them in the cloud or send them by email. If the encrypted data is intercepted by any nosy entity, they will have to waste storage space while waiting to be able to break the encryption.

What are some other possible methods?

Let us turn the tables on those who have been violating our privacy. Why do we have to be on the defense? Let us waste their resources in the same way that they are wasting ours!