Let’s examine the 3 reasons given one by one.
1. Compact mirrorless cameras now take high quality and high resolution pictures, so banning DSLRs won’t help one bit.
2. Put a sign that says no one is supposed to take pictures on the staircase. No one is stupid enough to anyway.
3. I believe advanced photographers take less pictures than happy go-lucky snapshooters.
The reasons do not hold water and London Underground has still not come out and tell us the real reason for the original ban. Probably some company wanted to gain exclusive rights to take and sell pictures and postcards there. A perfectly good reason and one that every photographer would accept. But, please no bull.
via pdn