Would be nice if you could search for girls that don't have an alert on AW!
I believe you just need to select in your search
"Exclude members that have been asked to verify"
But to be honest I wouldn't tick this as there are times legitimate girls get flagged. What I would do is
Select "They have logged in within the last week" This gets rid of a lot of time wasters.
Then select from the enjoys tick options that they
do not enjoy Bareback or Unprotected sex.
That will get rid of a lot of wasters. Then all you need to do is use the "Add To Blacklist" option of those girls you know you will never want to see. This means they never come up again.