Rogue url foung in webmaster toos
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Buon Giorno from 2 degrees C thick fog wetherby UK

On this site www.davidclick.com I ran a crawl test and came across a url that doesnt exist in my site, the findings are illustrated here:
http://i216.photobucket.com/albums/cc53/zymurgy_bucket/rogue-urlcopy_zps6c58ee46.jpg
The plot thickens... the source of the referring traffic to a page that doesnt exist can be seen here:
http://i216.photobucket.com/albums/cc53/zymurgy_bucket/rogue-link-source_zpsc70a34fc.jpg
My intial thoughts rae to disavow via this tool:
https://www.google.com/webmasters/tools/disavow-links-mainSo my question is please:
Is this sinister or should I just sit back drink a cup of horlicks and return to a Zen like status of inner peace?
Any insights welcome

Grazie tanto,
David
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Get your cup of Horlicks and get your sense of peace sorted. Regardless of action points, never knee jerk!
The broken link just seems to be a non-functioning mailto: link rather than a page link, as such. I could be wrong but that's my impression.
I would be tempted to put a 301 redirect onto your site redirecting that link to your contact page thus
- capturing the user and giving them helpful information and
- pointing the link to a fairly 'safe' location
That gives you time to maybe do a bit of digging into TopicWorld.net, see if it's real community or spammy forum, so you can then decide whether a disavow is needed. If you decide you don't want the link then I suggest you try to get it removed manually first as disavow can take weeks/months to come into effect.
Hope this helps.