I don't mean they should be in the install package, but maybe simply available for anyone who might need them.
I'm currently evaluating if Hikashop will suit my needs for a custom e-commerce website I am working on (we already discussed about this in another thread (multi-vendor shop)).
Having sample data available would have allowed me to setup a personal working demo site very quickly. In my case, I don't care much about the data I have for my customization, I simply need enough data to make extensive testing (multiple nested categories, multiple photos per product and enough products to test pagination, search, and so on.)
I don't mind that much setuping my own sample data. I'm just saying if every developper that needs/wants to customize hikashop have to make their own sample data, that makes a lot of "globally" wasted time.
Just my two cents