if you run your own domain and have a wildcard for email this is a very good strategy. I also never provide my real birthdate for (almost) anything. The vast majority DO NOT NEED IT, and the rare case where it might be required (still doubt it, but maybe age of majority or consent, or a waiver) I use Jan 1st of the real year. This has caused problems (ex: doesn't match your id) but on the balance seems to be positive.

Even without your own email hosting, Gmail kind of lets you do this by appending +whatever to your address before @gmail.com. Obviously this can be trivially detected and stripped but I suppose it is better than nothing. Multiple real Email addresses are definitely a best practice.

Like: [email protected]?

Yep. I do this a lot. It occasionally doesn't work (eg: some sites don't think + is valid).

To be fair, I don't think it's made a huge difference in my life. In fact it's possibly been more of a negative than a positive.

You do realize if this your strategy, you must own that domain FOREVER. Whomever purchases that domain after it expires now owns all your email aliases. Assuming you do a good job of changing all your emails at every service you ever used, there is still that potential leak. Large cloud services such as google do not allow name reuse. Of course paying for a domain name forever is probably still a better idea than a provider who can be purchased, but just a reminder!!

It’s a good call out. I’m glad that I used one domain instead of scattershot across all the ones I’ve owned: at least I’m only bound to renew the one domain. It’s a cheap TLD and hopefully it stays cheap!