Side-effects of Custom Who's Online

[Gratisites]

Hello,
I paid a freelance programmer to find this solution for me, but since I'm not familiar with vBulletin code I'm a little worried to put his hack live because of potential side effects.

The point of the hack was to get who's online to track what people do on non-vB custom scripts. I'm using 3.6.8 Patch 2... here's what I've done:

includes/functions.php

Line 5,201, commented out the exit; on the print_output function

Added this at the top of my custom script, let's call it TEST_SCRIPT.php (my forums are in /forums/ and my script is in a level back so I needed to go this route)

PHP Code:

$curdir = getcwd ();
chdir('./forums');
require_once('./global.php');
chdir ($curdir); 


Added this to the bottom of my custom script

PHP Code:

print_output('<!--log-->', false);
mysql_query("update session set location='TEST_SCRIPT.php' where userid = '".$vbulletin->userinfo[userid]."' and host='".getenv(REMOTE_ADDR)."'");
echo(mysql_error()); 


Then we added the references to that file in includes/functions_online.php and we were done. Who's online was now working 100% and tracking what guests / members were doing.

The part that has me paranoid is commenting out that "exit;". I'm sure it was there for a reason, have I opened up a pandoras box of problems or will I be fine? What are some side effects of not exiting that function right there?

Thank you in advance for your support.