For example, 'How can someone remote from a parent or loved one use it for day to day tasks - such as leaving messages?

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New York-based cyber lawyer Parry Aftab says that targeting an individual on the Internet - by sending nasty E-mail, leaving offensive messages in guestbooks or posting misinformation about them - constitutes harassment and stalking.

BBC: Cyberstalking: Pursued in cyber space

She said that people did not engage with 'doom and gloom' messages, leaving them feeling powerless.

BBC: Fun and games 'can save the planet'

Leaving three un-returned messages is a social and professional faux pas, Parnell says.

FORBES: What To Do When You Don't Hear Back After A Job Interview

Ms Ebadi said she had "received many threatening messages" since leaving Iran.

BBC: Shirin Ebadi Nobel Peace Prize medal 'seized by Iran'

Durant checked his phone moments after leaving the court and smiled recalling the text messages he received from Westbrook.

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It is one of the joys of leaving a job and an organisation: You can turn around and tell it like it is, giving harsh messages to friends and foes alike - it's especially effective if you are leaving on a high.

BBC: Robert Gates on Nato's dim future