[jeffhuys]

Just watch out that Chrome’s autofill doesn’t fill it in. Cost us a huge chunk of new signups until we found out. Chrome ignores autofill directives under some circumstances.

[kqr]

It's also visible for users with CSS overrides and/or other browser inpairments. The more I think about it the more strongly I prefer the "type 42" explicit input field.

[thih9]

You can label it “leave this field empty”, with a placeholder or similar - then it’s the same explicit instruction as “type 42”.