Pretty common in various states.
If you really did not have to, you should be fine today. In any EU country, Romania included, nobody can take you accusable backwards. Well, unfortunately, it is possible that the money you have now can be taxed according to some newly introduced rule 🙁
And did you have to, or not? If not, see above. If yes, you made a mistake.
Well, what happened – simply happened. Nobody can revert it.
Yes, I can imagine well that it could happen – regardless of fact that it︆ was not wise (just to save the money without any other measures).
A wise idea.
Perhaps a recommendation – such ways like using a fake TIN︉ cannot really solve your situation and can cause you much bigger troubles. Try to contact︊ a reasonable lawyer or a tax advisor to help you find a solution that will︋ be less bad than any other (it depends a lot on local environment that I︌ am not familiar with, so I can't recommend anything particular). It will probably cost you︍ something – but it's, unfortunately, a reality.