Mokita - 12:16 am on Feb 4, 2011 (gmt 0)
What bothers me about them, is IF they are providing Webmaster Tools, why is their bot visiting unless you asked it to?
I did a little scratching around, looking at whois and the IPs you provided.
The registrant for indeep76.com is located in Ukraine (that's a red flag for me).
Also, Reverse DNS for 188.8.131.52 is mail. smartviper. com. Put Smartviper . com into your browser and get this:
SmartViper – a web service that collects and analyzes any data about domains and keywords they are optimized for.
Reverse DNS for 184.108.40.206 is u15371126. onlinehome-server. com. If you type the last bits into a browser, it redirects to www. 1und1. de (1&1 in Germany)