Voting power is currently not the problem :) Also remember that delegations take one week to get back to the person to prevent exactly this delegation cycling.
The problem is too small votes. At one point 0.01% voting power is worth a dollar, what do you do then? vote everyone sending 0.1SBD up with $1? That would cost too much. So we plan to have multiple accounts for different price ranges.
Great to know, thanks! I've been here since June, but I still have a lot to learn! :)