While it's a perfectly fine choice to ostracize Yahoo for their actions, Yammer's CEO is going to end up looking like little more than a hypocrite at the least, and maybe a dipshit, if he doesn't apply the same rules to all companies equally based on behavior. The odds the CEO will apply the same rule to all other companies acting with patent belligerence? Approximately zero. They'd need a substantial piece of tracki…
No he's not. The patent move isn't the only reason to frown on Yahoo employees. The company has been moving sideways for quite some time which is when good employees tend to leave for better opportunities.
Just to take one example I'm familiar with, Flickr still has a lot of top-notch people.