Paper bags will

• Hide player gamertag
• Pacify angered neutral mobs
• prevent enderman aggression by staring

probably not but could be cool/interesting (maybe configurable options??)

• display gui similar to pumpkin head??
• turn hostile mobs neutral to wearer??

the neutral stuff is interesting but a bit weird since pumpkins dont do that. name tag could be an intresting unique feature. i made it conigurable. will be available soon