You still think that they wanted to 'persuade' or 'convince' people with this shirt. That's not true according to various reports.
On the other hand: I know _I_ would've giggled nevertheless, seeing people walk away with those.. That doesn't change the fact that the whole thing was a _success_ measured against the goals of the creators.
On the other hand: I know _I_ would've giggled nevertheless, seeing people walk away with those.. That doesn't change the fact that the whole thing was a _success_ measured against the goals of the creators.