searching for a participant in a very small meeting

We typically have 5 or fewer people in our weekly meeting.  When an intruder enters and starts bouncing around (using raise hand / lower hand rapidly), we cannot “catch” him because he moves too fast.  In larger meetings, there is a Search Field at the top of the Participants List.  No such Search Field exists in small meetings.  How do small meetings’ Security “catch” an intruder if he can’t be “Searched” (i.e., if he can’t become motionless in the Participants List)?  With more intruders/bombers, this feature should be available to ALL meetings no matter the size. Thank you in advance!