I wouldn't say it's impossible, but it will be difficult for Steem to successfully reach the masses.

Regarding the flags, those are just cyberbullies which also exist on centralized platforms. Just remember that you're not alone. The only thing he can take is visibility on general Steem frontends and your Steem rewards, up to a certain point (technically it's not possible for him to go after every single post). Visibility on DTube is completely unaffected as they can still rank in trending even it's flagged to nothing on Steem, and I believe the DTC airdrop is based on @dtube votes more than the final author payout on Steem (@heimindanger correct me if I'm wrong).