Date: Noticed this maybe a week or more ago but i was on holiday and was less active, but I am home now so I'm reporting it now
In-Game Name: Mr_Kieks
Minecraft version: Please Pm me for infos on this as I don't want to teach this to anyone reading the post. But essentially player heads can be obtained and placed. I put the head in /disposal to not cause trouble and would like this bug to be sorted out as soon as possible.