Ah, when will the world have enough of Britney Spears' mis-mothering? 

As her custody battle with Kevin "Fed-Ex" Federline continues to heat up, Spears has a string of mishaps that haven't helped her cause any. Cases in point: She reportedly failed a drug test (after being MIA for several earlier ones); she was on Friday banned by the Judge from driving her kids after she was captured on video running a red light; and of course, she'd been driving her kids around without a valid driver's license.

Now, Spears has decided to take additional "security measures” to ensure that her two boys are safe when they’re with her, the Gossip Girls are reporting. This, because according to her lawyer, Spears access has been "blocked" through "aggressive actions by individuals who have followed (Spears)."

Huh? This from the woman known to court the paparazzi and who repeatedly runs her vehicle over their feet?

Brit's problems have brought into focus her family history, which includes a grandmother who fatally shot herself at 31 at the grave of her infant son, and homeless, criminal uncles.

Is that really any excuse???