There are many questions about shipping on Travel.SE and we even have a tag called shipping which has 24 questions underneath it.
I recently observed this question on Shipping food from Texas to Canada, which I flagged as off-topic but on later considering the OP's point of view felt some logic behind their thoughts as well.
On that question, if the OP were to phrase it as "I am traveling in Texas and would like to send some food which I loved out here back to Canada, how can I do that?" That would be deemed perfectly on-topic I believe, solely because we have done that in the past.
So, are shipping questions on-topic or not? If they are not on-topic, what about the shipping tag and the questions tagged underneath it?