What may users legally do to cost Facebook and Twitter money? As a kid, I remember activists standing in the teller's line at the bank and politely asking to exchange ten $1s for one $10. They would return to the back of the line, wait their turn, then politely ask to exchange one $10 for ten $1s. For hours. The bank could either comply, or toss them out -- which event the waiting TV and newspaper cameras would record. I plan to leave both platforms, so being kicked off is not an issue. How can I do that in way...