Guy Fawkes hats?

I was under the impression that the hats are​

Guy Fawkes (1570 – 1606) hats...​

​

...You know - as in: Gunpowder Plot . ​

​

See picture of the conspirators below:​

Remember, remember the Fifth of November,​

The Gunpowder Treason and Plot,​

I know of no reason​

Why the Gunpowder Treason​

Should ever be forgot.​

Guy Fawkes, Guy Fawkes, t'was his intent​

To blow up the King and Parli'ment.​

Three-score barrels of powder below,​

Poor old England to overthrow...​