If animal rights activists can rant and scream about a magicians trick I don't see why they can't campaign against the sale of 1-5g bowls as goldfish tanks and similar problems.
They claim it has to be from magnets. Shrug, magicians are masters of deception and misdirection. It's possible...
"The important thing is not to stop questioning. Curiosity has its own reason for existing" A. Einstein
"Life is either a daring adventure or nothing."
"We can do anything we want to if we stick to it long enough." Helen Keller