I recently competed the finish doctoral research ethics course and in the lecturers opinion open raw research data will become more and more relevant in the next years, especially because it will highly increase reproducibility, which is a huge problem in most sciences at the moment.
But on the same side the new EU GDPR coming in effect 25th May, will give participants even more control over their data. Generally people can withdraw consent at any point in time. Of course, published data can not be retracted, but it complicates things.
And anonymisation is hard, too. In studies were demographics are very relevant to understanding the data or field studies, a combination of identifiers can be used to deanonymise study subjects, especially in smaller samples.
As for my personal practices: I specify, how I will use the data and already acquire optional written consent for data i want to publish (pictures, drawings, etc.).
I would love to see opensourcedesign be involved in privacy aware sharing of open research data. I’ll keep it in mind during my research. I believe there are already initiatives for this cause, we could cooperate with or look for as an example.