People do this with reckless abandon. They hashtag their own profiles on Twitter, making sure you know that they’re a #startup #founder and #Bearsfan like you give a crap. I’m not actually sure what they think is going to happen when they do this. Actually, I’m not sure they understand the concept of a hashtag.
I used to use hashtags quite liberally, until I realised that they weren’t really helping my marketing, and they made me look like a toddler. It’s cool to use them once in a while, but if you overdose on hashtags, it just destroys your credibility, something I learned the hard way.