A lot has been told about those cool companies that hire creative people that love to play with technology. A lot has been said about how some weekend projects have turned up in useful things to be used within the company, sometimes even major projects.
Such a passionate developer however might find himself in a situation where she's not allowed to use some tool X because of a restriction put up by his employer.
That restriction might be a minor annoyance, e.g. raise the barrier to entry because "doh, I need to go and grab my personal laptop for that? nah, let me use something else". Or it might be a deal breaker: I need to get some job done, I'd like to play with tool Y, use it to get the job done and learn new thins while doing it.
This kind of people, those passionate developers, will complain about that.
They will complain to their employee for putting up such a restriction (and you'll usually not hear about those complains here).
But they will also complain about why the tool Y has chosen a license that his employer find so problematic.
These people will not just stop complaining just because they shouldn't be wanting to play with things in the first place. That's what they do, and that's often why they are good at doing things.
People do complain when they have too many rules that hinder their ability to do stuff effectively. I do see that happening, quite a lot; and I can understand why and relate to it.
Do they have the right to complain? Well, that's another story.
If the tool is closed source and they don't want to buy a license, then sure they can complain but they will just shrug it off as "that's the way it is" and move on.
I believe that things start to be more blurred when you have an open-source tool, which suddenly you cannot use (I'm not saying extend and sell commercially as closed source!) just because of FUD around licensing.