I think we are in need of some kind of policy here.
The idea of those images is that you can download them and they are ready-to-use (which means pre-installing software).
This is in direct conflict with Debian branded images, because we want them to be as close to the standard distribution as possible.
Vagrant supports multiple config management tools - should we split the images up so that there are flavours (including vanilla - nothing pre-installed)? The maintenance effort would of course be multiplied because of that. I don't really have a preference either way, but this is not the first time this challenge has arisen and we might be in need of some general guidelines.