Are there people who don't care? Possibly. I'm not talking about them. I'm talking about parents with kids who are in school - whatever age level. They care - a great deal. Doesn't mean they agree about the solution. For those affected by today's stunt, they're angry.

I'm fairly sure it will have the opposite effect if the intent is to make people want gun control.

When I was young, back in the late 1970s, the state of Oklahoma was considering the equal rights amendment for the U.S. constitution. They were one of the last statest to vote on it, and if Oklahoma passed it, it only needed one more state to be approved. Polling the state legislators, it seemed likely to pass. Oklahoma at that time was run by the Democratic party. The National Organization for Women (NOW) decided that wasn't good enough and unleashed a campaign, having people from around the country mail postcards to all of the Oklahoma state legislators urging them to vote for the amendment. The legislature's post office was flooded with these things. There was so much, it was crazy. I was a Senate page at the time and we were tasked with helping sort through the mail because the regular mail room crew couldn't handle it. We were asked to sort out what had come from Oklahoma residents and what was out of state (the postmark told us). All of it was from out of state, none of it was personally addressed or written - just the postcards. The legislators were so mad at the attempt to influence them from people who didn't live in Oklahoma, the amendment didn't pass. The people of Oklahoma overwhelmingly agreed with their legislators. And to this day, there is no equal rights amendment in the U.S. Constitution.

So yeah, stunts and games to try and influence public or lawmakers opinions can have the opposite effect of what was intended.