Google indexes and also doubles URL by adding completely unnecessary ?do=email  so i advise you to turn off in ACP "share by email"

You can also create robots.txt file and put in:

User-agent: *
Disallow: /admin/
Disallow: /*?do=email
Disallow: /*&do=email
Disallow: /*?do=email&comment=
Disallow: /*&do=email&comment=
Disallow: /*&do=findComment&comment=
Disallow: /*?do=findComment&comment=
Disallow: /*?do=reportComment&comment=
Disallow: /*&do=reportComment&comment=

Sitemap: http://urltoyoursite.com/sitemap.php

 

You can do this yourself in your share settings.

Settings > Sharing > Click on Enabled and it will turn to Disabled

Viola. Email sharing is now turned off for your community.

54 minutes ago, Morrigan said:

You can do this yourself in your share settings.

Settings > Sharing > Click on Enabled and it will turn to Disabled

Viola. Email sharing is now turned off for your community.

I know this, i wanted to tell other users  

You don't need to use a robots.txt either do you?

System > Search Engine Optmisation > Meta Tags

Add the URL's robots noindex

That's what I've been doing anyhow

Two things wrong here.

1- robots.txt will stop Google crawling the URLs, it will still show them in the index. So use no index on them instead.

2- the ips meta tag system afaik doesn't work on pages with query strings, it applies the changes to the non query page too, so use x-robots htaccess to add the tag to those pages instead.

I go one step further and noindex,nofollow all pages with query strings. They are all junk.

The other thing, these urls only resolve for logged in users. Bots get a header response of 403 forbidden. The reason they are being indexed is you are using a robots file and google cant see the header response. So in this case, just remove them from robots, google will crawl them, get a 403 and eventually drop them. Seems you created your own problem here.