Am I allowed to put patches that I did not earn on my bag?

I think anyone who knows that's the 6th Group flash would also know you're too young to be fronting stolen Valor from a decommissioned SF unit

I don't pretend to know all the different types of bags, but if it is an official bag, then check with AR 670-1 and your squad leader. Generally, decorations are frowned upon. If it is an unofficial bag, be prepared to answer the inevitable questions the patches will elicit.

Define bag? Personal bag? No reg saying you can't do that. You will get funny looks but as long as you explain that they represent the memory of your Grandfather and that he is your motivation to be SF....then those that give you odd looks can go pound rocks if they don't like your answer.