Pretty universal. I did in twice - once for each job I had.Alas, if you work for a megacorp, when you join they make you sign over the rights to all patents obtained during your tenure, even for ones you create outside of work on your own time.
Then again, I'm not sure if that's universal or if I got suckered as a fresh-face college grad who didn't know any better.
I fail to see how if you were given a job & told what was required how you can begin to think you got suckered. At what age do people stop being victims & instead are responsible for their choices?