Go look in the mirror. When you come back, tell me, do any of these people look familiar?
<<pretend this is a photo of Carl's kids>>
If you didn't see any of the above people in the mirror, it should be intuitively obvious to you why it's not beneath Bo to go harass a booster at a hotel before a game who he thinks has slighted him. It sounds exactly like something he would do based on all of the other data. That's why it's a rumor that's not hard for people to believe.
As far as the cell phone point, it's a good one. But it doesn't mean it isn't the type of thing Bo is capable of. Again, that's why it makes for a good rumor.