Whenever a website doesn't allow me to delete my account, I just change my username to a random sequence of fingerjammed letters and then change my email addres

Whenever a website doesn't allow me to delete my account, I just change my username to a random sequence of fingerjammed letters and then change my email address to another random sequence. Seems to do the trick for me. But are you also looking to delete any comments or submissions you've made as well?