Ah, good old Slashdot. Pro GPL comments always go +5, Insightful and anti GPL comments always go -1, Troll, no matter what. This will be no exception, but I feel compelled to respond in case there is anyone left on Slashdot that is not completely brainwashed.
To be on the safe side we should all probably always use AGPL and/or GPLv3 for everything. We can always go less restrictive...
No. No, no, no. A thousand times no. GPL source code tends to attract more and more contributors. Over time, you have so many contributors that "going back" to another license becomes practically impossible, because at some point you can't successfully contact them all and get them all to agree to a license change. This was RMS's plan from the start -- for GPL to spread in this fashion. If you don't believe me, go look it up.
When that happens, you can't "go back" to a less restrictive license. To do something as simple as change the license... you have to do a full rewrite.
This is one reason why I'm not a fan of the GPL -- it becomes increasingly unlikely to ever be able make a license change over time, and I think that's an awfully bad thing for people.