2 prong

I'm replacing a few old two pronged and three prong outlets without a 3rd grounding wire in an early 1950's house with GFCI outlets with the sticker to code. Is there a reason why I shouldn't throw a ground to the box on there? (Still putting the NO EQUIPMENT GROUND sticker.) I understand that...

Hey guys, I am trying to convert several 2 prong to 3 prong outlets throughout my house that was built in 1959. I have attached 2 photographs of the outlet, one from the right, and one from the left. You will see the right side of the outlet has a RED and a BLACK wire attached to it. The...