[_up]

Not everything is copyrightable. You certainly can't draw a circle and claim copyright infringement to any other circle. So it depends on the Font. Is it really copyrightable if you take a public domain typewriter font and convert it to a sans serif font. I don't think it is enough.

[Wowfunhappy]

Most (good) fonts—even seemingly simple ones—take months if not years of work to build. I don't think your circle comparison is apt.