If you have to use gmail then at least use a "+something" after your account name.
For example, if you're johndoe@gmail.com, register your AW/other punting site email as johndoe+213lkjlbaegagra@gmail.com
Gmail ignores anything after the '+' so if someone sees an email address that way, you can claim it's spam.
If, however, you've replied as johndoe+213lkjlbaegagra@gmail.com, you're stuffed.
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Use a Tor network browser to hide your IP address. Means your Internet Service Provider won't be able to see what you're accessing.
Even if you use a conventional browser in incognito mode, the websites you visit are still logged by your ISP.
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Use a disposable email address site such as GuerillaMail or HideMyAss.
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When you're finished (on your PC/laptop), use an app like CCleaner to remove all the residue.
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Keep it clean and keep it going.