I hate to tell you, but even if you block ads, the fact that you are a registered and logged-on user of this site means you have a browser cookie and are being tracked to some extent or another, and more so if you're using this site with your smart phone. Even if you use Tor, that's likely compromised at the state level (primarily funded by the US Government), even if you use a private VPN, someone owns those servers and someone definitely owns the connections between the two. Your best hope for privacy on the internet is that no one cares about you personally, and your communications are not swept up in connection with someone they do care about - but there is no possibility of absolute privacy on the public internet.