WordPress Help informs that outlook.com “followers” are Spammers. Help goes on to say that, if we submit the date and the alleged address this will further assist WordPress in deleting/blocking the spammers.
Once the spammer’s address has followed the blog, all pirating potential is already established;
Once any address is blocked, the spammer hack just creates another.
WORDPRESS: PROTECT YOUR BLOGGERS’ MATERIAL. PROTECT THE SITE. GET THE FIREWALLS UP. OUR ORIGINAL MATERIAL IS VULNERABLE.