Personally I've decided to accept that buzzwords and titles will proliferate, and that this is impossible to prevent. Isn't the whole not-caring-about-titles thing part of startup culture? As long as you can do your job, I don't care if your business card says growth hacker or marketzilla or SEOgasaurous. You might face greater scrutiny if your resume says "Rails Ninja" on it, but in the end it's about whether you can program, and whether a Rails Ninja is a good culture fit when everyone else is a Javascript Pirate.
Doing due diligence (i.e, a proper interview) for a hire means figuring out the truth behind the bullshit. If you don't actually have enough knowledge to differentiate between a bullshit $TITLE and a good candidate who happens to call themselves $TITLE, then you don't have enough information to make a good hire anyway.
Hell, the titles are helpful sometimes. Candidates non-ironically self-identifying as a trendy title can help you filter out idiots. They're doing you a favor.