As I mentioned earlier today in the other thread about historical (pre-Covid) lockdowns, I have started this thread about seemingly irrational crazes and manias that have abounded over the years.

Of course we had the great toilet roll panic-buying earlier this year back in March, and we had the Nutella chocolate spread riots in France in early 2018, which interestingly weren't repeated here in the UK, thank God.

Can anyone think of any others (ultimately post-1945)?