oca-cola (Buy a bottle, talk shit to them, get more for free) SteelSeries (Use fake receipt, search Ebay for serials) Razer (Need a ton of proof, receipts etc) Skittles (Usually you need to buy in order to get the proof) WESC (need receipt, and pictures) HP (No past experience, I know that you need receipt, serial and order number.) Logitech (Need serials, order-numbers, receipts, all that shit) Skullcandy (Need proof, don't know how much)
DONT: Apple (Is aware of SE'rs. Will scare you off with lawsuit or by saying that law actions will be taken Microsoft (VERY highly aware of SocialEngineering. Will take legal actions and anyone who tries to SE they will get their information sent to MS's law part. Nike (Has law/SE organization/group. Is aware of SE'rs) Beats by Dr.Dre (Is aware of SE. You can try though