I suppose you could modify the robots.txt file to do this. So for example if your users were site/profile/edouard you could put in the robots.txt the following code at the bottom of the page:

Disallow: /profile/

The robots.txt is in the root directory of your site. It tells search engines what to ignore. A stacked member can verify if this works for entire directories beyond the folder itself.

Yep, Josh is correct and you can add the /profile/ segment into your robots.txt so that they will ignore such permalinks

Ok, thanks for your answer. And if I want that everything about easy social (Trophy, Group, Member) is ignored by search engine. How can I do that ?

Hello Edouard,

You'll just need to do the same for the aliases that you want to hide from search engines on your robots.txt For instance,

Disallow: /groups/