One of the effective and rank holding activity of off-page is Forum Posting. Through Forum Posting and strong on-page optimization you can get good rank for your website. Just because of putting signatures in forums.
For people that operate sites like WebDev - allowing backlinks is a real headache
Picking on DarrenLois for example and for the sake of this conversation - his signature aka backlinks look more like SPAM. They serve no purpose on a site like this other than promote what looks to be his business. It'd be different if this was a DIY home remodeling site.
So when posting on forums, make sure you post things that are relevant to the conversation
Hey guys, all your signature links here are nofollow links.
Does it make sense to leave nofollow links for search engines?
I don't believe you'll get a lot of traffic from this post links, so what is this for?