Any implications to changing the search index deletion policy?

Hi,

Our users are requesting to modify the crawl index deletion policy values (ErrorDeleteCountAllowed,ErrorDeleteIntervalAllowed, ErrorDeleteAllowed,ErrorIntervalAllowed etc...) to smaller values, as they feel that the default timeframe is too long.

Are there any implications in modifying these values? What else we have to consider before changing these values? Has any one changed these values in their farm and were there any consequences?

These policies existed in SP2007 and there were no way to change them. However, in SP2010, users have found that they can be modified and are requesting to do so.

Thanks in advance for any response.