Could have been worse, could have been Comic Sans...

That would admittedly have been worse, but thankfully not that likely. To stand in for a signature, people will be looking for handwritingy fonts that look cursive, not ones that look like printing.

I'm not sure I can think of a font in that category which is more clichéd and tacky than Brush Script :-/

Papyrus?

Snap! I was about to write just the same thing. :-)