It seems that anyone who does a bit of self employed work now refers to themselves as CEO.
I currently know people working from home in fledgling businesses doing dog walking, cup cakes, massage and nails. All have FB statuses of CEO which I assumed was intended to be amusing but no, when introduced to new people they will say, when asked what they do, "I'm CEO of a catering company/pet care company" etc.
Good luck to them all, I hope their businesses thrive and they get the income and work life balance they hope for but am I being mean to think get over yourself with the CEO thing?