Here's the thing. If you join a website you need to participate in that website. If all you do on a site is throw links to your hubs in there. . . .then you really ARE a spammer. I know - because I used to do that on some really good websites, and I got kicked off and banned from them.
All you have to do is comment things that are not yours, and be friendly - then you can link your hubs, and everyone will be okay with it unless it's just against their TOS.