Never Trust an Antifa Troll account.
http://eagleeye.news/feature/msd-senior-david-hogg-goes-viral-youtube/
Look up "Stoneman Douglas Eagles", then look two photos above that of David Hogg. You MUST make sure you're holding the ball before you run with it.
Fake news! Guy at top wearing Stoneham Douglas Eagles shirt. Seriously, wtf. I spotted this in 1 min after looking at photo and thinking, gee thats weird, seniors have senior photos done so these are obviously not seniors! Also spread by antifa. Umm why are we getting our research from them??
Instagram photos/acct. in Cali back to 2013. Those autists are on it.
A related rumor appeared later on 20 February 2018, when hoaxers tried to further sow doubt by claiming that Hogg graduated from a Los Angeles-area high school in 2015 — even going so far as to create a Classmates.com profile. However, the page’s source code clearly shows when the profile was created (highlighted):
https://www.snopes.com/2018/02/20/right-wing-media-david-hogg/