From "man tailf": 'tailf is deprecated. It may have unfixed bugs and will be removed in March 2017. Nowadays it's safe to use tail -f (coreutils) in contrast to the original documentation below.'
I just flagged this due to the stored cross-user XSS vector. Doubt anyone will drop 0day on this, but the alerts are annoying, and someone will probably play sound.
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[ 2.3 ms ] story [ 29.6 ms ] threadThis URL is polled, but it never returns anything: https://livesshattack.net/LongPoller.php?num=0
Also, it has an XSS vulnerability. I would not visit the site.
EDIT: ... and another one. Screenshot: http://i.imgur.com/V708b9l.png
Fun!