Honestly I don't know much about this whole topic, but it kind of bothers me whenever I see these warnings. I don't think updating your site to https is an unreasonable request. I like this website but it's a little concerning to see that warning every single time I go to sign in. Maybe I'm paranoid, it's not like you're asking for our credit card details or anything anyways, it's just a request that'd personally make me feel more comfortable here. I won't stop using your website just because of this, but I may switch over to an otherwise unused email, just in case.
(posting here to remain anonymous)
I understand the sentiment, but running a https requires yearly payments to one of these digital signature companies and since you can do most of the things you do here anonymously, I do not see is as a priority. Just do not use the same password you use here anywhere else and things should be fine.