I wonder if the poor legibility is part of the point. I would not wear an outrageous t-shirt such as this in public, but I would be even less likely to wear a more legible version — precisely because more people would be able to read it. Poor legibility may evoke curiosity in some people who are too far to read it, and perhaps even result in a humorous surprise when someone who could not originally read the text moves close enough to read it.

Smaller text feels like a whisper, and maybe that’s the effect the designer was going for