If you choose to enable Error Reporting using this wizard, Microsoft will automatically collect server error reports and ...

If you choose to enable Error Reporting using this wizard, Microsoft will automatically collect server error reports and client machine script error reports.  You can change your Error Reporting settings later in the Privacy Options section of Central Administration.  For instance, you can configure Error Reporting to collect SharePoint server errors only and not client machine script errors.  You can also configure Error Reporting to ask for permission before sending error reports to Microsoft.