do you still open e-mail letters or chain letters with "pls. do not open sign"?

i sometime get very few though in junk mail and i think it s junk right? So I do not open any junk if i am not sure about the sender. I first check for the sender and then if its from anybody I know or from any site i signed up, i go for opening the letter. I do not get much though, may be one or two time i remember i got this type mail

Dear lyn, what is this sign you are talking about? i have no idea. could you elaborate?

I know who are the correspondents with me. Ather than this, any stranger if sends email, it is just unsolicited and I send that to rycle bin without opening the same.

Normally, I prefer not to open it, but sometimes I also do like you, I cannot resist not opening it.

sometimes i do open them too out of curiousity, although i already know the content... lol. but because of my busy life i would just ignore them. anyway there's a :do not open" sign on the front righ :!

You've lost me, what is a please do not open sign?