Speaking frainkly I find (on a daily basis) too many
abused VPNs to think
TOR won't bring tons of abuses. Some months ago (I cannot remember when)
TORblock stopped working. Having a look at what did happen at time would be
an interesting path. In my perception it did bring to an increase in abuse
Might you have been talking about Bug #30716?  It happened in September
of 2011. In May of 2012 the bug was re-opened and it hasn't yet been closed.