It's a common trope, and has been around forever: https://www.google.com/search?tbm=isch&hl=en&source=hp&biw=1600&bih=799&q=people+vs+larry+flint&btnG=Search+I

It's a common trope, and has been around forever: https://www.google.com/search?tbm=isch&hl=en&source=hp&biw=1600&bih=799&q=people+vs+larry+flint&btnG=Search+Images&gbv=2&oq=tri-bar&aq=f&aqi=g1g-S6&aql=&gs_l=img.3..0j0i24l6.773.2395.0.2608.7.7.0.0.0.0.42.264.7.7.0...0.0.ruGaCW-JYvs#hl=en&safe=off&gbv=2&tbm=isch&sa=1&q=cover+mouth+protest+censorship&oq=cover+mouth+protest+censorship&aq=f&aqi=&aql=&gs_l=img.3...19901.24530.2.24864.11.0.0.11.0.0.0.0..0.0...0.0.RXEsH4JUiP4&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&fp=2759c00a07e88a9d&biw=1600&bih=744 https://www.google.com/search?tbm=isch&hl=en&source=... Also, People vs Larry Flint: http://i.minus.com/ibfNdJy39bLELF.jpg http://i.minus.com/ibfNdJy39bLELF.jpg Interestingly, most of the items on that ISERP are internet-related.