Only if you are trying to make an otherwise unremarkable design look much better than it is. This is gimmicky and misleading. This is what's been ruining Behance and Dribbble for a while now, pushing total crap to the front page just because it looks pretty and forcing others to focus on superficial decoration rather than on actually important parts like interaction and convenience.
The copy is spot on and sarcasm is well justified. Well done, OP.
If it's useful and the copy is meant to appeal to its target demographic, what's wrong with that? Clearly a lot of potential buyers seem to be appreciating the humor...
