Re: Will posting your link on many blogs and forums be a problem
It is a good way to promote your site if you a regular on those forums and blogs. It can improve the chances of people visiting your site and hence the popularity of it however that does not mean they will stay long as you need to entice them with unique, quality content.
Re: Will posting your link on many blogs and forums be a problem
In my point of view it is very cool and right way to promote your web links in communities and also search engines consider them in back links quickly if they are quality or high PR forum, blogs.
Re: Will posting your link on many blogs and forums be a problem
As long as it's relevant for your site, that's okay. In reverse, you can help your site by having a link on relevant forums and blogs and turns out to be a quality link. Make sure that you are posting to a "do follow" forums and blog.
Re: Will posting your link on many blogs and forums be a problem
Getting backlinks from blogs and forum is an effective way to increase your keyword rankings in serp provided that they are dofollow and relevant to your site's niche.