The Nassau County police issued tips today on how to keep safe on social-networking sites, reminding residents that whatever goes online, stays online.

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To mitigate online dangers, police offer these seven tips:

1. Don’t accept friend requests unless you absolutely know who they are from and that you would associate with them in person, just like real friends.
2. Be cautious about the personal information that you post on any social media site, as there is every chance in the world that it will spread beyond your original submission.
3. Assume that everything you put on a social-networking site is permanent. Even if you can delete your account, anyone on the Internet can easily print photos or text or save images and videos to a computer,
4. Learn how to adjust your privacy settings so that you know who can see your personal information.
5. Never post that you are on vacation or away from home, even if it is just for a few hours.
6. Don’t post or upload photos while away from your house, wait until you are back home before you post.
7. The old adage “some things are better left unsaid” holds true for social networks. Avoid making derogatory or insensitive remarks about others.