I tend to disagree with this summation, while there are of course countless sites that have very questionable security issues tied to them, AC forums doesn't appear to be one of those. If I'm wrong on this and others have had frequent problems with the forums here, please comment as I'm curious if this is an actual problem.These kind of forums are insecure to navigating...
Assuming you were referring to this: LG G6I didn't have much control to look at the url, it seemed full page but was steering me to click a link. Only control i had was to close the tab.
Was visiting g6 forum and the page was hijacked by one of those bogus virus alerts.