Technical Support does not create custom filters nor do they make recommendations regarding the filters.
The use of custom filters and properties does NOT invalidate the support contract or put the installation in an unsupported state.
During the troubleshooting of a environment using custom filters, Technical Support may ask the customer to disable the filter to ensure it is not part of the problem. If the issue is related to the filter, Technical Support will attempt to give as much information about the problem as possible but will not re-write or troubleshoot the Custom Filter itself.
Any problems not related directly to the custom filter will be treated with normal support procedures.