Sharing a Minidump is fine, because it only contains limited data:
A small memory dump records the smallest set of useful information
that may help identify why your computer stopped unexpectedly. This
option requires a paging file of at least 2 MB on the boot volume and
specifies that Windows 2000 and later create a new file every time
your computer stops unexpectedly. A history of these files is stored
in a folder.
This dump file type includes the following information:
- The Stop message and its parameters and other data
- A list of loaded drivers
- The processor context (PRCB) for the processor that stopped
- The process information and kernel context (EPROCESS) for the process that stopped
- The process information and kernel context (ETHREAD) for the thread that stopped
- The Kernel-mode call stack for the thread that stopped
This kind of dump file can be useful when space is limited. However,
because of the limited information included, errors that were not
directly caused by the thread that was running at the time of the
problem may not be discovered by an analysis of this file.
http://support.microsoft.com/kb/254649