Many webmasters make comments on various blogs, but their intention is only to get backlink,s nothing else. And just write (Name/URL) to make a comment in blogger.
Now you can do is disable post clickable link on the blogger comment. And you will get good result spam than before this use for your blog.
1: Go to >>> Blogger Blog <<<
2: Click the >>> Edit HTML <<< and then tick on >>> Expand Widget Templates <<<
3: Now search the following code below
<a expr:href='data:comment.authorUrl' rel='nofollow'><data:comment.author/></a>
4: Delete the entire code.
5: Now you are not face have a huge spam in your comments. And try to post links in your comment box area, you see the links are not clickable.
Done! You successfully save your site for spamming.