Dear colleagues,
I got this one in one project I did ethics review. It's great to hear about your thoughts/experiences.
"Doing an open recruitment online (i.e., via Facebook) requires public posts, yet it was slightly concerned about the possibility of tagging of potential participants without their knowledge by their friends, and third parties could abuse their profile. Welcome any recommendations/thoughts for minimizing the risk of being abused by third parties, but maximizing the target population."
Many thanks