I think the previous posters nailed it. Social media is the biggest culprit to me. Many of these kids try to fit themselves into this image of a modern athlete: part gangster, part businessman, part celebrity, part pimp. It doesn't make things easier when every undergrad that sees them out wants to snap a picture with them. These kids beg each other for shoutouts on twitter and instagram so they can amass followers. It is really odd.
I also think far fewer things were reported back in the day and coaches could get away with a lot more discipline behind closed doors. Add that to the fact that there just aren't as many upperclassmen around to have the youngins fall in line. Nothing is better than a respected senior setting the tone.
AAU ball and all the hooplah and travel associated with it only make things worse.
Another reason might be that the NCAA has never been weaker. It's just not as scary to transfer anymore. It seems you have a 50/50 shot of playing right away if you can find a sick relative and the move is closer to home.
I watched this kid play in high school. I saw him have some battles with WKU's George Fant in Bowling Green. Two BEASTS. He didn't seem like a bad kid, but he was always repping Cincy and very proud of being from there.