Creating a fake default value for Dropdown

Is any way to insert a fake value into a dropdown to use as the default value? I want to make sure the user picks up an option, not just click without reading (who would do that?) Currently I am using a check box to "sign"the screen, I do not enable the next step until user clicks an agreement, but using this fake value and enabling on change would be more elegant I think


Look at the following post


Thanks! This was very helpful