The nonstandard dot behavior turned out to be a really bad idea. I've had numerous instances of people signing up for other services (e.g. Amazon) with my gmail

The nonstandard dot behavior turned out to be a really bad idea. I've had numerous instances of people signing up for other services (e.g. Amazon) with my gmail address, adding various dot combinations. Whenever I have contacted Amazon (or others) to report a security issue--that I have access to someone else's account because "their" email address is routed to me, I just end up having a really unproductive conversation.