By the time of Bane, it's a Ghost Planet.

By the time of The Old Republic, they briefly resettled, but eventually left it again some time after, and this time for good. The first time came around because it was too far into the Deep Core to make travel to and fro a viable option (the hyperlane collapsed).

Homeworld Evacuation: They started off on the planet Typhon, which they abandoned once or twice.

By the time of the prequel trilogy, standard Jedi recruitment policy was to take children from their families, occasionally without even asking, and if the kids wash out of training (or get kicked out), rather than, say, send them home, ship their asses off to some no-name planet to work as farmers.

Good Is Not Nice: 'Guardians of peace and justice' they may be, but they can be arseholes about what they do.

Hell, the very existence of the Sith Order came about because the Jedi decided to spare a handful who fell. Even when the Jedi start getting wise to this, they never actually find a way to prevent it. Nearly every major dark side user in history is a fallen Jedi of some kind.

Create Your Own Villain: A major offender.

Afterwards, the Ruusan Reformation made it a rule they would only take in younglings to avoid this kind of thing. If it hadn't been for Bane, this might've led to bad stuff later on.

Child Soldiers: By the time of the New Sith Wars, they were getting so desperate for troops they were taking in any Force potential kids they could find.

After the Ruusan Reformation, they disbanded it, partly to help allay concerns about the Jedi ruling the Republic.

Badass Army: Actually had an army one thousand years before A New Hope, the Army of Light.

Aesop Amnesia: No matter how many times they get reduced to rubble, then rebuild, they never learn that positive emotions are okay, it's just the bad ones you should try and avoid.

Action Politician: During the Republic Dark Ages, there was a long time where the Supreme Chancellor was exclusively a Jedi.

When they finally did, they helped end said theocracy.

Achilles in His Tent: They did this a lot in the distant past, sitting out a good thousand years of a fascistic theocracy ruling the Republic wondering whether or not to get involved.

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