137
Instagram will blur nudes in messages sent to minors
(www.theverge.com)
This is a most excellent place for technology news and articles.
If the default date is old enough to get past the prompt, I use that one. If it isn't, I pick a random year that is. I don't have to lie unless I want a senior discount or something, but I just don't want to share my birthdate with any random site or service.