i would be interested to know how redsoxnut could distinguish a wordpress site from a movable type one if it were using a template other than Kubrick or the default? it used to be that you could tell from the uris but with mod_rewrite that is no longer the case. people are already renaming their comments files in both tools to stop spammers.
everything wordpress does to advertise itself within your installation, from meta tags to pinging ping-o-matic, is potentially useful to spammers looking for sites to add to their wp-comments-post robot. if you want to promote your site and wordpress, you have to be aware you are giving the spammers more ways in. sure, you can install plugins to deal with the spam, but wouldn’t it be nicer not to have them arrive in the first place?