RiD/Simba would be the 2 top dogs at the moment.
EpicBot and RareBot I would say are both fairly safe as well, but I wouldn't rely on them as much as RiD and Simba.
The people that talk about getting hacked get hacked because they are either stupid or just do stupid things. It isn't related to the actual bots they should be using (I say SHOULD because they could have downloaded a fake/infected client from the WRONG SOURCE).