I forget what or where now Victor, but there is a way to place a comment and it shows as someone with a legitimate blog as having posted the comment, although they did not. If no one comes up with a simple answer, I will have a look back as someone mentioned it in my blog.
I think it depends on the blog. You can't do it using "Open ID" unless you are logged in , judging from an experiment I just carried out here. But if you were just being asked to nominate a web page and the web page you nominated was a blog page, I expect you could get away with it.
As with the other commentors before me, there really isn't anything to stop what I am picturing. If I wanted to, I could easily show that my blog address is your blog address if I were to comment of someone else's blog. Many times the "HTTP:" field is one that isn't used for security clearance, but just as a way to show, "Hey, here's where you can find my blog," type of field. So if I were to anonymously leave a message, couldn't I leave someone else's blog address? Let me see if I can do it here under this post. I'll say, "Testing your thought" under anonymous.
Testing your thoughts.
It didn't look like I could do it anonymously, but as you can see, I was able to do it under the "Name/URL option". And no that wasn't me who did it the first time on that other person's blog. Have a great weekend!
andrew, marcellous and afod (Steven) - thanks to all. I don't know why I didn't realise how obvious it was that using someone else's URL is so easy. I'm too honest for my own good sometimes.
It's a shame that being too honest for one's own good can be taken advantage of. :-(