How to Delete Unwanted Spam on Blogger
Just in case you people tried and could not find a way to rid yourself of one annoying piece of crap...
If you have comment moderation disabled, go to your Settings regarding comments, and choose to view comments in another window. Save. Now, because the spam is an incredibly long text, you will not see the button for deleting the comment and you will not be able to scroll down normally.
What to do?
Select the text, as if you wanted to copy it, and bring the mouse down while still keeping the text selected. In other words you will try to select the whole comment. This will enable the window to scroll all the way down to the bottom of the comment, where you will find the great button "DELETE".
That is how you delete long pointless crap. :)