If he really wanted to enforce those conditions, all of which have to do with not changing the mark, he could have just used a Creative Commons NoDerivative lic

If he really wanted to enforce those conditions, all of which have to do with not changing the mark, he could have just used a Creative Commons NoDerivative license (with some exceptions if desired) instead of BSD. Software licenses are better suited to software, whereas this is more like artwork (although the boundary between software and artwork is kinda blurry nowadays).