Every week, there's a new Facebook thing to gripe about.

This week, there have been two -- and it's only Tuesday.

On Sunday, it was discovered that the 900 million-person social network was "testing" a feature that would let people see a digital list of the people who were nearby in real life. Called "Find Friends Nearby," the app was pulled down by Tuesday morning after the Internet freaked out. Commenters said things like "Hell to the naw" and "BAD FACEBOOK!!" and generally complaining that the feature, which was difficult to find, much less use, invades privacy and will lead to stalking.

If that's not enough, a company named Friendthem reportedly threatened a lawsuit, saying Facebook stole its idea for the location-aware feature. Apparently, Friendthem would like to share the heat.
Facebook: You've got a new email address

Item two: A blogger noticed over the weekend that Facebook, without asking permission, had changed the default e-mail addresses of all of its digital residents to @facebook.com accounts. It's easy enough to change back, as the site Lifehacker and others have detailed, but that little invasion of the hub of digital identity -- the Facebook Timeline -- was enough to make quite a few Facebookers fire back at their digital overlords. Security researchers called the move dangerous. Normal people felt violated.

"Up next: Facebook inside your underwear drawer!" a commenter wrote on our site.

So that was this week. But it seems like every week has been feeling a little like that.

The fact that an anti-Facebook sentiment bubbles beneath the currents of modern life is, of course, nothing new. When the company introduced the now-popular News Feed in September 2006, users threw a fit -- and many abandoned the young network, at least for a moment.

Let's put the brakes on for just a second and ask a few questions:

Are people mad about Facebook's individual decisions -- the e-mail, the tracking, the News Feed -- or do the roots of this discontent reach into deeper, darker places? If it's the latter, why are people so continually frustrated? Do we hold Facebook to too high of a standard? Is the social network turning its back on users? Or is it just that our digital lives are now so invested in Facebook that it would be nearly impossible to pull out at this point -- and, because of that, we feel helpless?

Here are a few theories about what's actually going on with people's unhappiness with Facebook. Take a look and let us know which you think is most accurate -- or offer up a theory of your own -- in the comments.

Facebook has become an octopus

And by "octopus" we mean it's got too many tentacles to manage. This theory is put forward by the blog the Next Web, which says Facebook is buying too many new companies -- Instagram, Glancee -- and trying too many new things. (This is a critique more commonly lobbed at Google, especially when it was launching one product after the next that flopped: Google Wave, Google Buzz, etc., etc.)

"When you start packing in more features while you're removing none of them, feature creep will happen and users will start to ask the question 'Why can't they just make it easy for me to talk to my friends?' " Drew Olanoff wrote. "After all, that's why people started leaving MySpace to go to Facebook in the first place, because it simply tried to do too much."

Writing for Forbes, Kashmir Hill puts it this way: "Facebook would love to be the all-inclusive resort of the Web, replete with complementary digital daiquiris (that you're forced to chug) upon entry."