You could have played them off. In general, I think everyone should secure their data from unwanted people. I hear stories all the time about some company's user databases being hacked, as was the case with Facebook.
There have been incidents of hackers hacking users' data from multiple websites. And they are trying to scam by using all those data. I also get this kind of email everyday because I used one of my email on tezos website. So you have to be extra careful while using important emails on any website so that you don't become a target of hackers.