Anything you have offered to the internet (no matter the intended recipient) the entire world has access to. Even the little "Lol" you posted 15 years ago to the antics of the kitty trying to catch the laser light.

I'm sure your account can be deleted. Perhaps the posts you made could be, too. (I don't think so, but...) It really won't matter because there are several ways to get the internet history of just about anything.

If the LEOs come knocking on your door, they probably have something already that they can hang on you. Just remember: you have the right to remain silent. Object to everything. Refuse everything. Make SURE you are under arrest then ask for an attorney.

Knock, knock.

Who is it?

Police. Are you John Doe?

Do you have a warrant?

We just want to know....

Good bye.

Are you John Doe?

No answer.