Do you hurt the spiders?

When a spider comes to you,will you hurt it or even beat it to death.spiders looks disgust but they do good to us or our belongings.
spiders eat insects for protecting us or our belongings from...

how can I delete the messages I have sent out?

I have sent out some messages to my friends which are saved
in the section "message I'v created".I don't want the messages left in my mylot account.
who can tell me how can I delete the messages...