Spam, or not??

I have been following a recent thread with interest. It promotes an acting course, and may, or may not be well worth the money. However...... The cynic in me watches post after post of glowing praise for the course pop up every couple of days, almost always by unregistered posters, and wonders if they are genuine. They may well be. I even went to the effort of looking at the IP addresses of each post, only to find one match amongst the posts. At the back of my mind is this little group of vikings singing "spam, spam, spam, glorious spam!"