While I see what you mean, I still think deleting his thread was a childish, narrow-minded and vindictive thing to do. Sure, in principle his posts are his intellectual property and he can do with them as he sees fit, but I also think that when posts contain information that contributes to and enchances the value of a BB (like many of his posts did), and when they are intended as such (as his posts clearly were), they cease to be one's property and more or less become part of that BB's "public domain". Besides, it might be argued that by deleting his thread he violated the intellectual property of others, whose posts in his thread were automatically deleted with it.