If you're generating them with blacked-out DL number and address, that's not really a fake identification card, is it? Not to mention you'd be generating an image, not an actual ID. Creating real-looking ID cards is much more difficult than creating real-looking ID card scans.
The most difficult elements would probably be faking the font, and post-processing it to ensure the text looked real (pixel-perfect accuracy and color for text would be a dead giveaway of computer generation).
> If you're [...] that's not really a fake identification card
I'm not a lawyer, nor a law enforcement officer, nor a prosecutor, nor a judge.
While agree that something to allow you to use a website shouldn't be a serious criminal offence it's easy to imagine that it could be painted as such: unauthorised access to website services after a clear warning; fake id instruments; etc etc etc.
This. Plus, if the service your using wants your ID, theres no point trying to trick it. Supporting them is like drinking poison then stomach pumping a few ounces of it and leaving the rest.
The most difficult elements would probably be faking the font, and post-processing it to ensure the text looked real (pixel-perfect accuracy and color for text would be a dead giveaway of computer generation).