The problem with social networks is that employers can use them to find any kind of information about you. This isn't true for the USA but for any country where they have a lot of IT-wise employers. HR people won't look for such information themselves but might ask a more tech-wise employee to do some additional support.
If you provide a link to your SO account and this site, they could check out your account and measure your activities online. With a reputation barely over 1500 where others are over 20.000 you won't look like a big expert. They will also look at all the questions you've asked (not many in your case) and all the answers you've provided. They will look at your writing style and especially focus on answers that you've given that received negative reputation.
And then the Q closed on SO and was moved here, so if they only see SO, they will see a closed question plus a link to here, where they might find more about you. From here, they can continue to look at SuperUser and the other related site, plus do some googling on the information you've provided in your profile. A simple Google search reveals a Twitter account with your profile name. From there, your blog can be found. Doing a second search on the URL of your blog reveals post (from you) at tbits. And by following the links and tips provided by your posts, they could find quite a lot of information about you online.
So, did you ever post pictures of yourself online doing something illegal? Posted stories about you confessing something bad? Do you spend a lot of time online, even when you should have been working? These things will all look bad. Assuming you're employed right now, I could try to use Google to discover how active you've been online. I could use this to determine if you were browsing and posting messages instead of working!
If you don't tell them about your SO account and when the link between your profile name and real name is is hard to make then your online activities might appear to be real low. You could of course register for SO with a different name, gain some reputation and then use that new profile to post.
Then again, if you haven't done absolutely nothing wrong online, it could be helpful.
Two years ago, my employer asked me to find some information about a soon-to-be new employee. His name was reasonably unique online but I didn't find anything interesting so he didn't use his name online. (He probably did use a nickname but it wasn't linked to his real name.) This was good, because it also meant that customers would not find much information about our employees. However, I did discover that he also was an amateur freestyle fighter, having fought several matches. He never mentioned this "hobby" of his and I noted that he might turn up one day bruised or wounded when one of his matches would go wrong. A bad risk situation, but my employer did hire him as a temporary employee.
In your case? I've seen a lot of blog activity so they might consider you a time-waster. Your reputation at SO isn't very high so I would not do this. At least, I wouldn't do this...