Opportunity to bet against Siena (Basketball)

I noticed something strange regarding the bet on market 'Euroleague 2010/11 - Winner'. The winning odd of Siena is extremely low at 4.9, whereas the other companies present odds in the range of 5.5 to 6.5. I am guessing someone “squeezes” the odd so they can take advantage of the resulting low values. However, there is a strong possibility that the other players will take advantage of this malevolent tactic. Therefore, might this turn against the ill-disposed player?