This is where your argument falls flat. Most people won't be convinced by people having a talk with them and winning the argument, but they will be convinced by simple peer pressure. If everybody's for it, why the hell not?
This is exactly what simple worthless ='s aim to do.
Eh. I agree with Firestorm on the whole "slacktivism" thing. This red equal sign is nice in theory and all, but I think it's mostly going to become like the gay marriage version of the "like this or go to hell" things, or at least similar. If it does change opinions, good for it!