What are your opinions/ comments on “Online Sales Tax” for goods and/or services you buy via e-commerce sites?

Andoryu.net asked: When must a seller collect “Online Sales Tax”?
What are the requirements to collect “Online Sales Tax” in a single state; in multiple states; in your country?
What goods/ services/ digital media and/or service is taxable when you purchase online?
When are goods/ services/ digital media subject to “Online Sales Tax”?
How does an online [...]