If you control a section then you could manipulate the data it controls.
If you control multiple then the minimum is that you multiply the above. The most is that you be lucky to control the specific sections used to validate a safecoin transaction and thus steal some coin.
But the chance of gaining even one section is not as easy as it sounds but on a small network the possibility cannot be ruled out at the moment. BUT we haven’t yet seen all the protections yet. I’d say that there will be a point after which that even the likes of google or China could gain control of any sections.