The reason was simple. After the flash mob on October 4th, he received a telephone call from Amitabh Gupta at the Mumbai Police commissioner office, who explained that prohibitory orders were still in place in Mumbai after the twin blasts of August 25.
Read more on rediff.
I am sure there are some more mischievous dudes out there waiting to do it. Hey but don’t do it in the already tense mumbai.