No one really cares if a strong player makes a bad move. We tend to care more about weak players who make good moves, i.e. sandbaggers. As much as I find it despicable, at the end of the day it doesn't matter if you rank is real or not if we play as long as I get a good equal rank game out of it.
There are some servers (forgot which. some one remind me if you do) that detect if you are constantly switching screens to mark you as a suspected cheater if you are a or bot or referring to some joseki site.
At the end of the day this only really impacts real live matches with priizes so we aren't really affected online as we have nothing but a virtual rank to lose. Probably will have stricter rules on bathroom breaks in future which will be a pain (like toilet supervision or phone confiscation).