on the other hand i know countless subcontractors/vendors that have dozens of work email addresses from different companies and are not really employees of any of them.
so yea, emails are not a trusworthy source of anything, but filtering singups based on addresses is very common.
have recently been in an interview were the scriptedness feeling crept in after the first few up-beat intro questions were done. didn't felt professional at all to see them working a questionaire with me.
yea, in oss projects, users tend to feel more like stakeholders than with products of some mega-corp.
we all know that these feedback channels just create a corpus of opinions to be used for arbitrary arguments by management. no one is gonna read or even react to this unless it's necessary.
even remember a time when my galaxy s4 mini would ask me how it should represent itself when connected via usb; also drivedroid to emulate a cdrom drive with an downloaded .iso in order to boot older computers that don't know how to usb.
maybe i have been spoiled by the real computer in my pocket experience of custom rom's.
so yea, emails are not a trusworthy source of anything, but filtering singups based on addresses is very common.