Seems Caplan is in favour of copyright law. I don't know how this can reasonably be enforced. Ironically the one form of IP I am OK with is trademarks - and a weak interpretation at that. For example in Matt Land the following image could never be construed as a copyright violation.
|The colour scheme and fonts are absolute dead ringers for|
those of the 'Enjoy Coca-Cola' advertising campaign.
However there is an obvious difference in content, so no infringement
of trademark is taking place.