The D7 Store. What am I doing wrong?

I just installed the store module and WHY O WHY are members allowed to sell products in the store? Okay, there must be a demand for member to be able to sell their wares as well as admin/site owner, otherwise it would not have been coded that way, but I would say there would be much more demand for it to be restricted to the admin/site owner than for it to be available to all. Maybe I have missed something and there is an option to disable but I see no other way of disabling the members selling abilities other than hacking the code. In short it makes this option useless to 95% of the people wanting to use a shop.

Also, I was not interested in selling videos or files, but merely a few items of branded clothing which would need to be posted. Yes, including caps and t-shirts...

Think I will drop this module like a hot potato and just use a basic hand coded dolphin page for Paypal purposes.

Lastly, if the store were to be changed to accommodate items to be sent via snail mail, then the ability to record the postal address and invoice address (if different) need to be included . Also purchases need to be available to non-members.