It says it's listed on a blacklist of domains involved in spam. But it's not clear if all the folks pointing at the one blacklist are examples of it being relisted multiple times or just people rereporting that it's on that list. It's not listed in the last 30 days of additions at http://www.joewein.net/bl-log/bl-log.htm so I'd suspect that 2013-02-07 'event' listed on WOT is meaningless.

Considering the time of its first listing was right around the time of the domain's registration, and that the blacklist is apparently a list of domains /mentioned/ in spam, I wouldn't be too sure it's not just a case of some spammer copy/pasting a list of 'recently expired / created domain names' in a pitch for domain registration or something like that. Seeing as it's just the one blacklist, the current owner might be completely unaware of it.

Hard to guess, though. His MXs aren't listed on any of the usual blacklists, though that's not necessarily where spam would be coming from. On the other hand, spammers don't usually list their name and employer on the front page of their site.