Erika rules
Okay, but giving Sony money is not the most effective way to express that sentiment.
I mean, what’s the reverse of a boycott?

Boycotts don’t work either, for that matter.

It’s weird that we so often see political/social problems and think “I know, I’ll help solve this by giving (or withholding) my money from some for-profit corporation and hope the influence will trickle down to the cause I actually care about!”

Instead, you know we could just support activists working to advance that cause (or outlaw that bad corporate behavior) directly, right?

If there is enough will, boycott works. It work to help end the apartheid in South Africa.
The Montgomery Bus Boycott was also famously effective.