I have heard about this as well and she has been booed because Gypsies are not seen well in Romania.
Why? Because more then 70% of them break the law repetitively. From small stuff like a theft to other much worst crimes. I personally really have nothing against them since they are people just like we are and every country has it's bad seeds, it's bad people that drag it down but another big reason why Gypsies have started to be seen worst in Romania is because they started visiting more and more foreign countries and embarrass us by breaking the law the same way they do it here in Romania.
When they are caught by the local police of the foreign country in which they broke the law they say they are Romanians, not Gypsies, not Romas or anything else. Thus us, the Romanians have started to be seen very bad all over Europe.
I am not saying we don't have our bad Romanians, We have a lot of those as well but overall the proportion of Gypsies that break the law is much, much, much higher then the Romanians that break the laws inside or outside of the country.