Be wary of prayer is not suspect of God. But eling lan waspodho with our own desires. A thief just praying that his action will not get caught, does that mean that God grants all prayers from everyone? Let's ponder this. Although in the case of the thief there will be consequences on his life for having done bad deeds.
I have examples that we should make lessons. This is a true story.
So my best friend, her parents' house in Purwokerto. And he has been working long enough in Jakarta. One time he came home he was uncomfortable with the squat toilet in his house, because he was so used to the toilet seat in Jakarta. He asked his father to replace the WC squat in the house with the toilet seat. But his father was reluctant because unusual with the toilet seat. That's how it goes. Every friend of mine is home to ask WC squat at home replaced with toilet seat. Finally, because long ask not to be approved by his father, there is a "pause" in asking. One time my friend is back to Purwokerto. And he had an accident, both legs were broken. And because my friend is not able to squat finally his father replace the toilet squat in his house with toilet seat. Granted! Desire for this, WC squat at home replaced WC sit completely answered.