The 4 entries in https://www.mediawiki.org/wiki/Special:Contributions/Sabienladen have been Hidden by someone else.
The timestamps in that feed should be clickable, and should lead to the post/topic that was hidden. If there were changes to the post, the timestamp should link to the specific revision.
Also, the timestamps should Not be struckthrough, as that formatting is only used for revdel content.
(Similar (click/strikethru) issues in Topic/Board history pages: https://www.mediawiki.org/w/index.php?title=Topic:Rvnx8zm95io4xdbb&action=history )
(Strikethru issue also at RC/Watchlists, but the timestamps should not be clickable: http://ee-flow.wmflabs.org/w/index.php?title=Special:RecentChanges&from=20140910162717&limit=6 )