Bandit signs: why use basic text only?

[Jason Munger]

I’m NOT asking if you should or shouldn’t use them.

I’m curious why most people make their signs look so simple or hand written.  Why not use a logo and make them look more professional?  Does it work better to lead people to believe you are just an individual looking to sell a property?  Are you trying to look inexperienced?  Or is being a business a deterrent?