I think 4 weeks would be best due to account recovery also lasting 4 weeks and in worst case scenario if you're afk for a longer period the hacker/pw thief won't empty your whole account in 5(possible undelegation)+7 days.

Yip 4 weeks is the perfect balance that takes security into consideration.

4 weeks are ways better then one week. Because otherwise exchanges can use the Steem for Votes.

Pleasure, 4 weeks is the best compromise I could get that pleases everyone. Thanks for your support and encouragement!