A sign of the times probably but it seems nearly all sites are being driven towards using https these days. Browsers give warnings about using non-https sites because login passwords are transmitted in plain text, meaning that they could be read.
I'm prompted to write this because Bitdefender (my security program) has updated recently and even this now steps in and gives a warning when I log into sites that aren't yet using https. The risk of logging into non-htttps sites/forums isn't any greater now than it was before of course but it is necessary for me to bypass that warning to log into some places.
It looks like, in the end, all sites will have to use https to avoid their visitors being warned of a security risk.