-Should doping in sport be legalised?
I think that doping should not be legalized. Athletes have to demonstrate the effort and sacrifice in each competition without having to dope.
-Will it ever be possible to stop athletes breaking the rules to win?
It could be possible, but there would have to be a lot of controls to avoid that this will stop happening. Maybe it can starts in the most popular sports, but I don't think they can control all of them.
-Are athletes who take drugs cheats or are they victims?
Athletes can make they own decisions, so in my opinion most of them cheats.