emno

Largest order was for 1,000 custom "Fuck You" balloons. I asked why out of curiosity and she stated it was for her cheating ex.

Generally, they don't.

I have not, but that's actually a great idea.

Actually quite the opposite, most customers buy it for their best friends, families, coworkers. It create a sarcastic/funny/unique experience.

I had a weird request. Someone wanted me to fill balloons with dog poop and was willing to pay a lot of money to do so. I didn't want the company to be associated with that, so I had to decline.

Google is your best friend, but remember that entrepreneurship isn't an easy road.

Try selling on Etsy first to get the hang of it! There are a lot of companies doing what you're thinking of doing.