But for a different reason: It allows a "catch all" email, so I register on every site as <sitedomain.com>@vekslers.org and have my account act as a catch all sink. This allows me to both filter out spamming sources and trace back who leaked my email address to 3rd party sources. This approach is a pivot on the name+tag@domain.com email tagging which most js form validations devs are unaware of it being a legal email syntax and thus do not allow.
This relives me of the need to worry to post my email address, which is news.ycombinator.com_3698017@vekslers.org out in the open (true emails are very much welcome).