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Can you give an example please? How dose ignoring dots cause you to receive other peoples mail?
johndoe@gmail.com and john.doe@gmail.com are obviously two different addresses. At least for me. I don't see why the first one should receive mails from the second one.
If you don't want to use the feature, you don't have to. Lots of people find it extremely useful.
https://support.google.com/mail/answer/7436150?hl=en#zippy=%...
> if your email is johnsmith@gmail.com, you own all dotted versions of your address
> If anyone tries to create a Gmail account with a dotted version of your username, they'll get an error saying the username is already taken.
> Your account is still private and secure. Emails sent to any dotted version of your address will only go to you.