I totally agree with you. I sent some of my research - which I do not post online but share with family members that are interested - and My elderly cousin's son took my work and posted it online without asking or crediting my many years of research. Unfortunately, this has made me less willing to share. I never share living people.
Judy Russell did a post on this several years ago along with a discussion of plagiarism and copyright.
Carolyn Lea (Schwarzbaum)
Schwarzbaum (Posen) Lewinsohn- Levison (Elbing) Rothschild (Germany) Basch (Poland/England) Hammerstein (Poland)