As far as I know, you do not have to log in to participate in this site. That's what the Anonymous Monk is for. Right? So, why would one need to log in with Google credentials if they can use this site? As an anonymous visitor, you can access (read) all that this site has to offer. You can search. And you can post. Correct me if I am wrong, but the only thing you cannot do is have a profile description or collect XP points or manage the site. But as a visitor or newbie, why would you want to do that? This is the most easy-to-use websites as far as login goes. Don't ask me about the design though, because that's horrible. This is probably one of the ugliest and hard-to-find-what-youre-looking-for websites I visit on a regular basis. But as far as logging in and ease of logging in I give it 5 stars.

Logging in using Google credentials would only add to the complexity of this site, I think. And I hate when I visit a new website, and a little pop up shows up that says, "Hey, why don't you log in to this site as <my Google username> ?" I hate it. I always say, "Leave me alone, you stupid! I don't want to log in! I don't even know what this website is!" But if I learn what it is and I start using the website, I might log in. But even then, I prefer to create a separate username and password. I don't like to use my Google signin for everything. I have a separate username and password for Facebook, ebay, my web hosting, and everything. The only time I use Google signin is when all other attempts fail, and the site seems buggy and I can't create an account or can't log in with my existing username or password. So, people are going to have double accounts as a result of adding Google login option, because if they forget their regular password, then they will just log in using their Google credentials, and now you have a bunch of accounts which are double, and you'll not be able to track which one is connected to which. So, I don't know. I think, this is a bad idea.

If you want to fix something, then fix the site design. I'd say that's far higher priority than fixing the security. When I first started using this site, finding things was a nightmare (it still is sometimes even though I am at level 12 now). For example, there should be a "POST A QUESTION" button right in the middle of the landing page (front page) so you can't miss it, so when someone who has never been to this site comes here, he can immediately post a Perl question as anonymous and don't have to browse for 30 minutes to find the link. That'd be a great improvement. I'm talking about this link: https://perlmonks.com/?node=Seekers%20of%20Perl%20Wisdom#post