mounted usb devices crash

[Marco]

hello list,

i ran into a lot of crashes because of problems with externally mounted
devices through usb. after successful mount, an ejecting of the device,
w/o unmounting it, ususally results in a freeze of the system, followed
by reboot. also with defect hardware, or cable problems this occurs. is
there a way to protect my running os from such behavior, any kind of
flag i could set?

best regards,
 marco