When I wrote about the wrangling over the GNU GPLv3 licence a month back, it provoked a lively conversation in the comments. Given this evident passion among readers, I thought it would be interesting to ask the top hackers - the ones actually involved in the discussions - for their thoughts on the matter. So I contacted Richard Stallman for the FSF angle, and a bunch of the top kernel hackers - Linus, Alan Cox, Greg Kroah-Hartman, Andrew Morton and Dave Miller - for their view.