These quite harmless yet annoying Spam Bots run a specific pattern, pretty much like the pattern of pickpocketing. When there is a lot of activity due to an upcoming holiday - these trolls also increase their activity. At least this is my experience in other .SE sites.
We'll see if these things won't disappear by them selves in the beginning of next year. If not, we may need to act.
In the mean time, keep those flags warm and reach for the Marshal Badge!
Thanks to you, Hugh, I found they target this URL:s "https://sharepoint.stackexchange.com/questions/47027/how-to-link-to-a-local-folder-or-document" answers. Different answer each time, unfortunately. So I've protected the question but am not sure if this will make these bots go away. We'll see what happens.
I'm pleased to present
On this topic. To help combat the increasing amount of spam and purely abusive users, Stack Exchange has developed systems that work on a network level; actively learning from actions that users and moderators take. These systems are designed to operate silently in the background, you don’t need to do anything special in order to make them work, there aren’t any extra buttons to push.
Upcoming filters for suggested edits
Soon we hope to be rolling out additional checks into our spam check system to deal with an oft-complained situation - a post getting riddled with suggested edits by spammers. We will track how frequently any given post (question or answer) is spammed in a given amount of time. If someone attempts to spam a known target, they're dealt an immediate and harsh penalty in the system.
Note that detecting these won’t clear them from the system - these edits will still be in the system and must be cleared from the review queue. Similar to audits, edits that are identified as spam edits will be clearly marked for reviewers, informing them that the post is most likely junk and the review should take this into configuration.