Users who Never Logged in

Hello Experts,

Can somebody look at the below query and tell me if this is how I can find out the User's who have never logged into Business Objects since their creation?

SELECT TOP 6000

SI_NAME, SI_LASTLOGONTIME FROM CI_SystemObjects

WHER SI_NAME NOT IN ('Administrator','Guest') AND SI_KIND='User'

AND SI_LASTLOGONTIME IS NULL

ORDER BY SI_NAME

The total number of users we have is about 6000 and when I run the above query I'm getting a list of 3500 users. So does this mean 3500 users never logged into Business Objects Enterprise? Do we just leave these user as such or disable them? What is recommended?

We have XIR3.1 SP4.

Please advise.

Thanks in advance.