Indeed, all the marked-up ads I have seen have been either on platform-side station walls, or in the subway cars themselves.
Some ads manage to achieve a sort of self-defacement (though I guess this isn't unique to subway ads). My favorite may have been one that tried to tout an airline's comfortable seats by having huge letters arranged like this:
A H H H H H H H
H H H H H H H H
H H H H H H H H
H H H H H H H H
H H H H H H H H
H H H H H H H H
H H H H H H H !
...on a background of a cloudy blue sky. And, OK, I know they were trying to depict a long, contented sigh, but there's a fine line , at least typographically, between that and a blood-curdling scream, and I'm not sure they quite captured the distinction with such a minimal display.
I like your idea about the stickers, actually. I may do something with this. >:)
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Some ads manage to achieve a sort of self-defacement (though I guess this isn't unique to subway ads). My favorite may have been one that tried to tout an airline's comfortable seats by having huge letters arranged like this:
...on a background of a cloudy blue sky. And, OK, I know they were trying to depict a long, contented sigh, but there's a fine line , at least typographically, between that and a blood-curdling scream, and I'm not sure they quite captured the distinction with such a minimal display.
I like your idea about the stickers, actually. I may do something with this. >:)