MPD is becoming more well-known since the recent movie "Split." I have heard of what you are talking about also, in2itiveart; at first I thought it was only fictional (like George du Maurier's 1895 novel Trilby) but since the survivors of this kind of programming have been coming forward, there has been a huge explosion in the use of the mind control symbols in advertising and music videos. Ival115, look at https://vigilantcitizen.com/ for details if you're interested in knowing more.