It does makes sense in terms of resulting damage. Make a bot that will post new discussion, it will instantly get flagged to oblivion. Make 10 bots that downvote something - it will take quite some time for the mods to find them.
It just seems to me that you ought'a be able to downvote before making posts (and also flagging). Perhaps good upvoted comment boughts ought be able to make submissions (eventually), too..?
