Need some way to disable username comment links

Hy,

In Java you have annotations that are written using '@', like @Override etc.

Commenting on pull requests becomes a challenge if you also want to write an annotation because the site tries to transform that into an username link.

For, example, just noticed that @ link is an actual user but it's also a Javadoc tag (http://www.oracle.com/technetwork/java/javase/documentation/index-137868.html#

).

It's also unclear to me if this isn't a security risk – will referencing users without repository access actually leak some private information via email or the web site?

It would be nice to be able to disable this at repository level or to just restrict it to users that have access to the repository.