Because the links get rewritten and may not be what you expect, observant people might have noticed the changed links and find them suspicious - but please understand that the urls being changed to sur.ly urls is very much on purpose
A number of domains linked to (trusted domains) won't get rewritten, and posts by explicitly trusted user groups (like moderators) also won't be rewritten.
We are currently running this as a trial; it seems to be a good service and useful addition to protect our users. It's unfortunately not possible to disable this on a per-user basis if you, as a user, don't like it, but Tobin has written a small script to rewrite URLs back to their bare form.
https://greasyfork.org/en/scripts/22256-unsurly





