...I'm no "web security expert"
but
looking at the site's source code shows it
to be "plain vanilla, old school" HTML encoding.
I did not see anything that looked even
remotely "tricksy".

...I don't think there is anything to be
concerned about.*

*today

web pages can change at any moment..
and that can make the infoweb..
an ...adventure.

...squirrel today...
.........rhinoceros tomorrow.

________________

...there are a lot of sites/forums that are wired
to autoreject URL's posted in such areas as "reply" boxes
or forums. [discourage spamalicious advertising]
...entering a URL in a non standard [incorrect] format will evade automatic detection..but can still be
understood by the [human] reader.

Example:
..Youtube will reject/refuse to upload a viewer comment
if there is a URL in it. [drove me nuts before I figured
out what was going on.]


.