The following instance occurred on the pug server just now but is applicable in public games as well. My understanding is that a supplier cannot be placed defensively in an attack lane and have supplier killing be considered sup spam. A couple of examples: any location on Niven in the base hallway, or near or on the core of any map.
On Kanjar, a team that places the supplier in the middle base area behind the core runs the risk of receiving damage or getting killed by the common tactic of firing grenades off the back wall with the intention of damaging the core. Caught some flak for it in the last pug but thought I would post it here for all to see and comment.
In other news...
"Banny is a male fleece."
~Cella