Reverse traceroute and spoofing of sources of packets?

I missed this meeting/preso when it happened (yes, 5+ meetings ago)

<http://www.nanog.org/meetings/nanog45/abstracts.php?pt=MTE4OCZuYW5vZzQ1&nm=nanog45>

I note the talks about using spoofed source packets to do some
measurement, I didn't see anyone in the video say: "But spoofing is
bad, but you want YOU to be able to do this? what? isn't that a little
hypocritical?"

Isn't it? and why would someone (an isp) disable BCP38 for this sort
of activity?

-Chris

According to the presentation they were planning on releasing a
downloadable tool by May 2009, but in searching around I found no
evidence that this was ever released.

-Ryan

http://revtr.cs.washington.edu/

I was also looking for a such a kind of tool some days ago.