[forgotpasswd3x]

It's not the same thing, because leaving a tip doesn't cause any privacy or security issues. If all ads were just static images, no scripts/tracking, I wouldn't mind them.

[Alupis]

well, there is a closer parallel than you'd think.

Every McDonald's you eat at, has the ability to track your purchases, likes, etc. You are, after all, swiping your card with your name, etc.

[forgotpasswd3x]

Not if I pay cash!