If the site is generating real looking IDs using fake data then it won't be of any use for voting. When you vote they check your name against a list and if it

If the site is generating real looking IDs using fake data then it won't be of any use for voting. When you vote they check your name against a list and if it isn't on the list you can only cast a provisional ballot, which will get tossed later when your name fails to verify. Penalties for in-person voting fraud are also very stiff so this is not a likely scenario.