Recommendations on presenting LHC searches for missing transverse energy signals using simplified $s$-channel models of dark matter by Boveia, A, Buchmueller, O, Busoni, G, D'Eramo, F, Roeck, A, Simone, A, Doglioni, C, Dolan, M, Genest, M, Hahn, K, Haisch, U, Harris, P, Heisig, J, Ippolito, V, Kahlhoefer, F, Khoze, V, Kulkarni, S, Landsberg, G, Lowette, S, Malik, S, Mangano, M, McCabe, C, Mrenna, S, Pani, P, Pree, T, Riotto, A, Salek, D, Schmidt-Hoberg, K, Shepherd, W, Tait, T, Wang, L, Worm, S, Zurek, K