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Facebook co-founder Mark Zuckerberg has been increasingly willing to share moments from his family and work life.

But a photo he posted on Tuesday, intended to promote Instagram's user milestone numbers, may have ended up revealing a little more about Zuckerberg than he intended: Dude hasn't lost any of his hacker caution when it comes to protecting his privacy. 

A couple of eagle-eyed observers pointed out that the laptop on Zuckerberg's desk not only has tape covering the webcam, but there's also tape covering the Apple laptop's dual microphones. That's right, even one of the most elite (and richest) coders on the planet still takes rudimentary measures to ensure that nobody is spying on him. 

This inadvertent reveal comes just weeks after Zuckerberg's social media accounts were hacked, one of which reportedly had the not-so-complicated password "dadada."

And if Zuckerberg's hacker background and role as a major tech leader aren't enough to convince you that he isn't just being paranoid, consider the fact that earlier this year FBI Director James Comey admitted that he puts tape over his webcam.

This kind of thinking used to be the domain of conspiracy theorists and a certain breed of hacker, but Zuckerberg just took it mainstream. In fact, in the run-up to the second season of Mr. Robot, the show about a hacker conspiracy, USA Networks even went so far as to send out branded webcam covers (which this journalist happily uses). 

No, government spies probably don't care what you're saying or doing in front of your computer. 

But if it's good enough for the creator of the largest social network on the planet, maybe it's worth sticking some tape on your own webcam. You won't look paranoid anymore; instead, you can call yourself a billionaire tech mogul in training.

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Well, this did not go as planned.

On Wednesday, Tinder launched a pilot to test out a new feature, Tinder Social, which allows groups of friends to match with other groups of friends. Rolling out to a select test audience in Australia, the feature was immediately pilloried online and in the media as an invasion of privacy.

Here's how it works: To form a group on Tinder, the app shows you a list of your Facebook friends who may or may not also be on the app — it's not clear, although Mashable has reached out to Tinder for clarification. You can pick a few to form a group, and then chat with other groups to see if you might like to meet up. 

The big glaring problem here is that your use of the dating platform is easily exposed to Facebook friends. Even if you're comfortable with close friends knowing, most people's Facebook friends list is a glut of old teachers, ex-boyfriends and backpackers you met once in Prague.

The company seems to have realized the error, adding an update to its Tinder Social blog post clarifying how the feature works. Tinder will let you opt out of being added to groups, but it appears the feature is automatically switched on for those selected in the pilot, which is far from ideal.

"We are only testing it at this point," it added, "but it's important to note Tinder's not a secret considering 70% of users download Tinder because their friends recommend it."

The issue is, by signing up to Tinder, you agree to this type of shenanigans. If you read the terms of use and privacy policy — and why would you? The Terms and Conditions site estimates it will take 63 minutes to read — Tinder reserves the right to modify its service at any time with or without notice. Although that right, too, has proved controversial lately.

With Tinder Social, the app seems to be attempting to broaden its appeal, aiming to help you find friends as well as romance. "It's not group dating, it's a fun new way to meet new people out with your friends," it insisted. As Mashable noted in March, Tinder recently acquired Humin, a startup that created a contact-management app. Perhaps that's another indication it's looking to leverage its user base beyond dating.

Do people really want Tinder for friends or workplace networking, though? Tinder users may find out, whether they want to or not.

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