Invisibility - stamp

Just a little stamp that i wanted to create a few months but i hadnt time and idea xD But now i got one idea so here it is xD It's maybe just me, but i hate, when are people invisible. Mainly here on DA, because then i dont know if they are here or if they already left. Or if I want to tell them something and I'm waiting for their reply that i need to know quickly, but i dont know if they are there, or not... It makes me CRAZY!!!