I found this on Wikipedia on bump proof locks. I don't think I'll sleep well until I get my locks changed!
Locks made by ABLOY, KABA, Medeco, Schlage, Kwikset[9] and other manufacturers such as BiLock[10] are advertised to be bump proof. ABLOY uses disc tumbler locking mechanism that can't be bumped. Kwikset offers a new technology called SmartKey[11] that eliminates the shear line in traditional pin tumbler locks and provides advanced protection. KABA experT cylinders consist of 4 rows of pins using a total of 22 pin possibilities, therefore the bumping method cannot be used to gain entry. KABA pExtra is an inline system that is available with a magnetic pin to prevent the bumping method being used.[12]
Medeco and Schlage Primus locks are advertised as unbumpable due to sidebars that must be aligned to a specific depth to enable pin movement and pins chiseled at angles to further thwart bumping.[13][14] However there are also recent studies about how easy it is to bypass this sidebars feature.[15] Master Lock also makes a line of bump resistant locks, using so-called bump stop security.[16]