What are the voting intervalls?
Voting is continuous and never stops. Anybody can be voted up or down at any time. This is why it is so important to have hot-swap Standby Delegate nodes (at zero reward) ready to go continuously to take the place of a $300K-per-year Active Delegate node that is suddenly voted down.
What could possibly go wrong?
This is where an attacker outside the 101 could DDoS individual delegates until they lose their position and the attackers delegate gets moved up into the 101.
I can't believe for one minute that, if there's enough value involved, this won't happen.
it will happen, just be prepared.