OP_RETURN
data(utf-8) - bI was pleasantly surprised to spot the "BCH accepted here" sign in this video about Hong Kong protests (2:22)
https://www.youtube.com/watch?v=VXog6t4kNycshow raw data(hex) - OP_RETURN 621 492077617320706c656173616e746c792073757270726973656420746f2073706f74207468652022424348206163636570746564206865726522207369676e20696e207468697320766964656f2061626f757420486f6e67204b6f6e672070726f74657374732028323a3232290a68747470733a2f2f7777772e796f75747562652e636f6d2f77617463683f763d56586f673674346b4e7963