Thanks to all for their input.
I'd like to clarify for those with questions.
What concerns me is not knowing where I am going when I am asked to click on a link.
Before I click on any link in a post I look at the linked URL(the full address of the link) when I hover over the link. Redirects can take you where you don't expect to go, but if the URL looks straightforward, like nationalrail.co.uk or tfl.gov.uk or sbb.ch or bahn.com then I can be pretty confident that I am going where I want and not to a phishing site.
One liner posts consisting of nothing but a link and maybe a "look at this" really have me wondering why the poster doesn't want to introduce the piece and explain what is on the other side of the rabbit hole.
If the URL is very long with lots of miscellaneous characters I have to look at a long address to decide if I like the look of it. That takes me time and energy which I don't want to waste.
Sometimes people will use a website like TinyUrl which shortens the URL to many fewer characters. I really have to make a value judgement then as if I trust that post. It is rare that I will click on such a link. I can go to the website that made it or LongUrl and expand it so that I can see the original address, but I'm unlikely to.
To quote the LongUrl website:
"TinyURL and other like services solved a problem brought on by the advent of micro-blogging—limited message length. They do this by taking (sometimes incredibly long) URLs and creating a small compact one that redirects to the original.
"Solving one problem, though, created another one: obfuscation. There's no way to tell (for sure) where a shortened link goes by just looking at it. So, then, I could send you this link http://is.gd/2kz and tell you to check out the photos from my recent trip, when in fact I'm sending you to a video of Rick Astley singing "Never Gonna Give You Up". This is bad for users."
Now, on the other side of the coin, occasionally I wish to contribute a link which is very long and I will use a TinyUrl. If I do insert that link I always try to provide the long link in an open way to paint the context for readers.
My goal is to remove obfuscation and provide clarity for readers...
Does that make it clearer?