Date: February 18, 2016 01:16AM
Registration is not required to use the site. There are now online digital images of many records that they have on microfilm. Some, because of requirements by the agency that holds the original records, require that you do have an account with FamilySearch and log in to see the image.
I've never been contacted by anyone from FamilySearch or LDS by having an account, so you have nothing to fear. Many of the same images that are free at FamilySearch, are also on Ancestry where you have to pay.
For some indexed U.S. records look at these:https://familysearch.org/search/collection/list#page=1®ion=UNITED_STATES
Also check "catalog" on the drop-down menu under "search" at the top. Enter a location, and look at the records available. If there is an image of a camera next to a microfilm number as thesehttps://familysearch.org/search/catalog/329200
you can click on the camera and go through on-line digital images from the microfilm.