Today I signed into my sky Drive web account (which is unusual for me since I usually access my documents through OneNote locally) and I clicked on the Shared tab. I was interested in sharing some files with co-workers and wanted to test out that feature. To my surprise, there were several (8 total) items shared with me by users I don't know. These were unsolicited, and I did not receive any invitations via email (nor did I accept any) to view these items. These are highly suspicious links, since each one is created by an "unknown" user and shows only a picture of a scantily dressed woman. (see screenshot below) I am very concerned about these links as I am afraid that they contain malicious code/viruses/malware/etc. I am afraid to even click on them to delete them, since I am concerned that in any way interacting with them might cause their contents to sync locally to my computer. Please help me answer the following questions:
1) how did these albums come to be shared with me? did someone just spam my email address?
2) if these were sent by a spam-bot, why do they appear in my shared tab without any action on my part?
3) how do I get rid of them without risking infecting my computer with the contents of the shared albums?
4) is there any security risk to my computer currently, having only browsed to the shared tab page and not clicked on any of the "shared albums"?
5) how do I prevent this from happening again?

please note, the "shared by me" album "lab notebook" is mine. The others are the suspicious ones.