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[pfy]

The BBC article "The Science of Optical Illusions" has a comments section at the bottom with the warning:
At no time should you endanger yourself or others, take any unnecessary risks or infringe any laws.
This comes the day after they reported the death of Benoit Mandelbrot, pioneer of fractal geometry

Comments

[pplfichi]

To be fair that warning is a standard disclaimer that appears on all their comment pages, but it does seem we might be living in dangerous times...