There is talk of the UK state requiring users to upload government-issued ID such as a passport to create or update an account on social media or pornographic web sites. This is not a particularly new idea, and was tried by parler with the predictable result that hackers got access to the data resulting in potentially negative results for those who provided accurate data.
It would seem that a sensible precaution one could take would be to submit a fake identification document, either editing to remove PII or taken from the web (perhaps even the parler hack). While the government could change the law when requiring such identification, what is the current situation regarding such a request? If a social media or pornographic web site started requesting government-issued identification documents today is there any law giving such a request legal standing? Would it be legal to present them with an image that was not of your actual document, however generated? Would it be different if an image of a real document that does not relate to the submitter, an edited document that did relate to the submitter or a completely artificial image of something that never existed?