Suicide message boards have gotten through courts in the US, because the owners are not responsible for providing the means for discussion of such things, nor are they responsible for what adults post onto their forums, for the most part. If someone is knowingly under 13, then you must take action. Medical, above 18 usually Internationally. Stick with commonsense and you are fine.
Geez... how many have tried such nonsense with search engines... they are the means only, they do not write the content contained within their search results and thus provide a service free of charge.
Freedom of the press extends around the world... and unless something is protected by a privacy agreement, you have little worry nowadays. Just don't copy another's work, or as stated already, use snippets IAW existing laws to do so, providing the original source is credited. If you copy the entire news story, then you are at fault for copyright. Simple as that.
I agree with what has been written though... if you have a community that is contentious in nature / topic, that causes such ongoing legal threats, etc... then do a one-off local legal advice and get your facts, get a legal legal policy and cover your arse... and comply with it, and you have nothing to worry about.
I run mental health and medical based communities, and I have been through all sorts of nonsense as you have outlined... and a legal legal policy shuts them down immediately, providing you comply with it yourself.
Otherwise... they may as well turn the web off.