Your comment reads a little strange, if this kind of agreement is unfavorable for employees, makes it easier for a former employer to prove breach of contract, and contributes to an exploitative industry, why recommend signing it ? If we collectively as employees argue and refuse to sign such a clause, it will create pressure to make it go away. On the contrary if we sign it without a fight, the clause will spread throughout the industry, making it hard to negociate. I've been pursuing a career in that industry for several years, and I've successfully negociated that clause away when I came across one that I deemed exaggerated, and I encourage everyone to do the same.

I don't really see the link with free software either, preserving the right to use one's mind, the single most important thing a developer has, seems very important no matter what.