Rose: Yes this play is not correct. So my suggestion is when a bid is way lower than the lowest bid in the last round (say 200 pts), if this is not almost all they have (say, max 2000 pts left), this bid doesn't count as the lowest (while falling in), the next player with the lowest bid falls also in, and so on till a player ''succeeds'' for these criteria.
This way stops that advantagous playing Viking told about, for me that is called CHEATING.