Symbols for no, forbidden Emojis
There are surprisingly many symbols, which forbid one or other activities, in the standard emoji set. From the No Smoking sign to a Red Cross mark, which can be used for literally anything. For a less aggressive prohibition, use a black cross (which is also a multiplication sign), or a solid white circle, which looks quite delicate and diplomatic.
🚭 No Smoking Symbol🚷 No Pedestrians🚯 Do Not Litter Symbol🚳 No Bicycles🚱 Non Potable Water Symbol🔞 No One Under Eighteen Symbol📵 No Mobile Phones⛔ No Entry📛 Name Badge🚫 No Entry Sign❌ Cross Mark⭕ Heavy Large Circle💢 Anger Symbol♨️ Hot Springs✖ Heavy Multiplication X⚪ Medium White Circle