Please help me understand this: If the concern is about the quality, so how about the time that there isn't a modified font and instead the designer did the modifications to the text written by the font (as in a typographic poster)? Are we going to be concerned about that as well? I mean I'm a graphic designer and it is safe to say that I never use a font without doing some changes to the text.John Hudson said:I think the assumption that concerns about quality are concerns — or primarily concerns — with reputation are mistaken. It isn't that I think that someone will see a poorly modified font and associate it with me, but that I don't like to see things created with care and attention to detail being messed up. For me, the concern about quality is concern about the thing itself.
This is not to suggest, of course, that all modifications result in a diminishment of quality, but it does mean that if one has a blanket permission for modification in a license, then one is surrendering any kind of quality control. It's extra work, but I think requiring a licensee to contact you and ask for permission to modify a font is a reasonable requirement. It allows one to ask some questions, offer some advice, or even propose to make the modifications oneself.