My adult friend finder
put them in a text file on your desktop called "my secret online identity", put them in an encrypted keychain such as 1Password's. Then go generate yourself a fake identity: Be conscious also that sometimes the phone number is required for verification purposes, for example you may need to demonstrate that you can receive and SMS to the number.
Often people's fabricated personas come undone once payments are involved.
They're simple, mostly free and easily obtainable by everyone.
I'd also like to encourage those who do give online anonymity a lot of thought to leave their suggestions in the comments section, keeping in mind the target audience being your normal, everyday people.
The easiest personal identifier that will match you to a site is your email address.
It's a well-known identity attribute, it's unique to you and there are multiple ways of discovering if it exists on a given website. Also consider how you fill out the following form when you create the account: These attributes won't show up on other sites where the address is used, but they can start to surface in other places.