I think its probably meant well,but is kinda offensive...the real nasty people who need their brains reprogrammed with a blunt instrument would just laugh or ignore it.
There may be a few people to whom it makes a difference, how they feel,after seeing it,but then,they would be nice to start with....I'll give it a B-,for trying a bit lol
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I'm just realizing ..oh,wait,I have to Google that...