No. By allowing the practice, people who are okay with being stalked get compensated for their value. People who don't consent to the transaction in question are not a party to it, and are not being taxed; they're paying the regular price.
No. The "regular" price is whatever people not opting into stalking are paying. Capitalism is based around supply and demand, and people who don't want to be stalked are willing to pay more. That's not an upcharge. That's the default price.