But there's really no point in a patent if it can't be used offensively - by which I assume you mean filing a suit on the grounds of infringement of the patent. If you waive that right, then everyone is free to infringe your patent with impunity.
It certainly wouldn't protect against patent trolls, more against the big companies the article is talking about. I don't know enough about the american patent system as to know whether such a system would help much with those.