Op here. Thanks - esp to 12:24. Just to clarify, we cc'd others not to entangle them so much as a heads up to the storm coming their way, as MIL called the world to validate herself. Which happened. Things are calmer now for everyone, but we are still confident of our decision. DC is not immune. She has done things to jeopardize his physical safety before. We are in the process of redoing wills & guardianship directives to ensure DC will be protected.
To 08:33, DC has had an email address for a while - only for communication with family and teachers (to clarify assignments). Going forward, we are opening it up to his friends, with a heads up that it will be monitored with diminishing frequency as he demonstrates good use. I know it's a little early for that, but we are going to a place where he doesn't know anyone yet & doesn't speak the language, so email is important for him right now.
To 23:26, my mom was estranged from her family (third world country - they sold her to be a maid for another family at age 6 and things got worse from there). Bad, right? But it didn't stop me from being increasingly curious and wanting to see them for myself. As a young adult, she finally helped me organize a visit with them at my insistence, and within minutes, her mom was asking me for money. It was easy for me to be repulsed & I quickly discontinued contact with her parents. At the same time, my moms sister and daughter are pretty nice, so I'm happy that they are now part of my life. I thanked my mom for protecting me from them for all of those years, and was happy to connect to the good parts of her family. Im sure this personal history is coloring my perspective on my current situation.
Problem is that DH's mom is way more subtle - she can be fine, even nice for a while, but then land something soul crushing and hateful on you, or completely abandon you when you least expect it and are very vulnerable. The impact is mostly emotional. As an adult, it's been hard to handle; as a kid, both DH & his sister grew up feeling shameful, like her vindictiveness was their fault. They're 10years apart, and only now (& with lots of therapy) have learned that she put them each through separate hells.
When I was a kid, it was hard to communicate with my moms parents - you had to write in another language on special blue paper and get driven to the post office for airmail; my mom didn't facilitate this and it just didn't happen. Nowadays, Email and instant messaging makes it so (too) easy. I want DC to have privacy and to learn to use these things wisely - same as any other parent. But with us, there is the MIL twist. If communication with his grandmother is verboten, he may be even more curious about her (like I was). Her name & contact info has been removed from our family address book, so it will be hard for him to find her on his own. But I definitely wouldn't put it past her to try to communicate with him. I'd rather see if messages or even attempts are coming & going than have them sneak behind our backs. Am I being paranoid?