Usually people share power strips to minimize daisy-chaining and this year we actually have a few extras thanks to Q, but I think Ryder's point was simply that you shouldn't be bringing non-essential peripherals that draw power.
Power strips for chargers, etc. Netbooks are fine. Point was: NO SPEAKERS. This has been a rule since the very beginning. It was just worded awkwardly.
Comments
unless you are pro like me and bring an iMac, then 1000 watt speaker it away!
also, added headphones to OP
... but what if I need an outlet for my netbook too o_O