[nhawk]

I don't know if changing the templates will harm anything but it shouldn't.

Go to ACP->Styles & Templates->Search in Templates and enter

{vb:phrase posts}

in the Search for Text box for the style you're using.

That will bring up all templates that refer to a member's post count (or any other template that uses post counts for something).

You can then either comment out the lines that have the post count info in them, or delete them.