The question at https://stats.stackexchange.com/questions/5523/ , for example, was quickly closed as "pure advertising," which it is. Nevertheless it still appears among the list of questions and thereby serves its intended purpose of spamming this community. Thus closing appears to be an ineffective resolution. What effective options do we have to counter such abuses?
If leaving the post around is harmful (i.e. language, illegal content, blatant spam, etc), it should be deleted by the moderator immediately. But if it is simply closed as something like off-topic, the ability to "vote to delete" will appear after a few days (10K user power).