Someone could say frogshitters are like Cirnofriends, but for frogshitters are spreading on multiple boards, I even saw one on /jp/.

This leads me to conclusion

People who spam frogs are actually people sent from redit to destroy 4chan, they used Pepe because mods can't crack down on them because it would be seen badly by the posters.
And Hiro would be seen as a destroyer or 4chan.