Persistence.
If someone who tried to contact you on italki and didn`t succeed, began to write to your friends asking them for help, what would you do? Thanks.
P.S. No comments, please, dear sender. :)

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Report it, don't pay attention anymore and move on. You win nothing worrying about a few lost minds ...
I hope everything gets better ! 
=)

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Hi. Go up to Site Feedback in the top right hand corner of this page and email the Italki team.

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block them.LOL,I am so mean,joke.

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Report it to the moderator of this site.  This is harassment.  Tell your friends not to answer this stalker.  The moderator can give them a warning or delete their account.

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maybe succumb to the stalker if he is handsome? ;)