there is this user called swallowmywords-tastemythoughts who will remove credits of themes and then get extremely rude about it and assume youre not the rightful owner of the theme when you talk to them about it. 

theyve been using one of my old themes that i created under my old url im-halsey and removed the credit. now my themes are published under daddythemes and they assumed me to be a liar and said that the theme wouldnt belong to me! 

keep an eye out on them!