Oh dear, I have to say I was dismayed by the tackiness and insensitivity of it all. Reading the gospels, Jesus is certainly straight with people, but he did not set out to humiliate and fool them. OK Christian believers are to be as wise as servants and harmless as doves, but are we called to be smart alecs?? Hmm...
Riding my bike around my home town today, I come across this notice board outside a Christian church,
I fail to see how the invitation we may give to our friends, colleagues and workmates, to come with us to church to hear the Bible taught and to experience the family of God meeting together, should be restricted to those who are 'well-disposed'. The Bible offers a wonderful invitation to 'all who are thirsty', or in the words of Jesus, 'come to me all who are weary and burdened' (Matt 11.28).
There are enough barriers and obstacles in the way of people in our secular culture without making the gospel decidedly unattractive. As Paul says to Titus, we are indeed to 'make the teaching about God our Saviour attractive' (Titus 2.10). Thank God our only 'qualification' is our sense of need.