The Sun understands that the teen drama's latest instalment, which showed psychotic councillor Dr John Foster (Hugo Speer) appear to beat Freddie (Luke Pasqualino) to death with a baseball bat, caused controversy following its airing on E4.
"There was no need to do that to Freddie. You've definitely lost your fans," one fan remarked.
Lucy Russell of charity Young Minds said: "It could stop young people getting help."
Channel 4 said that only 11 complaints were made in total, adding: "The audience expect adult content."
The series finale of Skins airs on Thursday at 10pm on E4.