It's a simple solution, no more upvotes for introduce yourself posts and boobs. Period.

No matter how awesome the person is, we just leave them our "welcome home bud!" or "nice tits!" in the comments and that's it. Everyone is cashing in on the gullible, even the legit and "verified" accounts, and they better start contributing something beyond a few selfies before Steemit drops thousands in their pockets.