Today I remembered that the comments module was enabled for this blog. I went to see the new comments. It was litteraly over 9000.
So I had to delete them all. Unfortunately Drupals comment list only shows 50 comments at a time, and bulk deleting comments will only affect those 50 comments. There is a confirmation page too of course.
There was no way I was going to click through all that, so what could I do? Well I found this usefull tip and it worked like a charm! :-)