I like Washington's approach, responsibility is upon the state resident to declare taxes due for purchases made out-of-state, leaving the matter to one between the resident and their state.
Besides, if I don't have an office in that state, are they going to charge me and extradite me to answer for failing to collect a few dollars of tax?
Yes. Long arm of the law.
Those are good points of why the burden should be on the taxpayer not the business selling the item. That states cant figure out how to enforce it isnt the business problem.