1. You don't need to be on the trusted list of an open profile to make corrections , add family members, etc. But, if you make major changes, talk to the PM first. If you don't get a timely response, bring the problem to g2g and discuss what changes you think should be made.
2. Deliberately creating dupes is illegal.
3. Profile managers don't own the profiles. Their purpose is to facilitate merges when necessary.
4. The best way to protect your family lines is to source the profiles with documents. Citations under the sources label such as "Aunt Prudence's scrapbook - bad, bad, bad. That's why editing feuds flourish