[EricH]

By the 2007 rules, this is legal provided that redabot is never touching more than one ringer. However, in this scenario, six ringers wind up in the corner along with redabot. Redabot has therefore moved six ringers at the same time, or almost the same time (unless exceptional luck is with them). According to <G09>,

Originally Posted by SECTION 7.3.2.3 <G09>

POSSESSION - ROBOTS may only have 1 (one) GAME PIECE in their POSSESSION at any time during the match. Inadvertent bulldozing of GAME PIECES while the ROBOT moves around the field is allowed. Controlled "herding" of a single GAME PIECE lying on the floor is permitted as long as no other GAME PIECE is in the POSSESSION of the ROBOT. Herding of multiple GAME PIECES, or herding of a GAME PIECE on the floor while in POSSESSION of another GAME PIECE is not permitted (as this would be considered POSSESSION of more than one GAME PIECE).

(emphasis mine) Possession is defined as:

Originally Posted by SECTION 7.2.1

POSSESSION: a GAME PIECE is considered to be in the POSSESSION of a ROBOT if it is being fully supported by the ROBOT, or if the ROBOT is controlling the position and movement of the GAME PIECE. A GAME PIECE on the floor is considered to be in the POSSESSION of a ROBOT if it contacts the ROBOT at more than a single point (e.g. the ROBOT has a concave "plow" feature that is used to push the GAME PIECE in a controlled manner).

I'd say that that's pretty clear: Unless Redabot has somehow thrown six tubes one at a time into the corner autonomously, I'd call herding and its associated penalty (whatever that is).