The worst thing that can happen to an innovator is not that somebody copies your precious thing, is that they (trolls or not) sue you first, that you can't even compete. Even if the patent is bogus and you hope to theoretically win the legal battle you'll go broke from even trying.
http://www.ipwatchdog.com/patent/patent-attorney-fees-explai...
The survey data cited in the post is from 2001. The post also says: "If you are looking for experienced patent attorneys at a reputable firm you should anticipate hourly rates to be somewhere between $275 to $400 per hour in areas outside major metropolitan areas and somewhere between $400 to $800+ per hour in major metropolitan areas."
FYI, patent litigators, who handle infringement claims and validity challenges, generally charge significantly more than those who do patent "prosecution" (that is, prepare and file patent applications and shepherd them through the USPTO examination process).
https://en.wikipedia.org/wiki/English_rule_%28attorney%27s_f...
Here in Germany, losers pay and the cost for lawyers is calculated by the amount the argument is about. This way, you can't bankrupt someone by winning a minor argument in court using extremely expensive lawyers.
Some companies with deep pockets are now fighting back at patent trolls to make it as expensive for them to do business as possible, and possibly even invalidating the patent in question. Regular ol' software companies obviously can't afford this, as it comes with price tag in the millions.
Then I could be safe from lawsuits in Germany if I confined my evil acts to things that were about too little money for the lawyers to be interested in going after?
[1]: http://news.cnet.com/8301-32973_3-57409792-296/how-much-is-t...