You would be in legal trouble for breaking electoral law. Based on what happened today, if there is proof that the electoral process was tainted, the elections can be annulled by the constitutional court.
So, your stance is that any foreign nation can disqualify any candidate they like by running a few ads for them?
Think seriously about what you're saying.
Foreign nations are not allowed to be involved in the electoral process in Romania by law and could lead to the annulment of the electoral process, which is what happened. The process will start again from scratch, nobody was disqualified.