Ok, for the people who are interested: The problem is getting quite absurd:
I didn't want to restore my iPad (and my iPhone and my girlfriend's iPad and iPhone and the iPhone of a friend...). There was a chance that the issue could be resolved by restoring to factory settings but that is not a solution for me. For me, restoring is a workaround, if you don't have a solution.
So I decided to investigate that issue in detail.
1. I wrote a mail to the webmaster of that site with the detailed description of what is happening.
2. I tested many other devices resulting that most of them were redirected but some weren't. I couldn't figure out what happens. Some devices were jailbroken, other's weren't. It appears to be completely random.
That was weird... Before I could make any assumptions, the issue was gone. Just gone. On the iPads. Now I thought that the webmaster had some kind of strange javascript bug fixed...
BUT...
My iPhone is getting redirected (now to that url: Ip6.bemydate.mobi/mobile ***! Some days before the iPad redirected to a google.play site and now it's this f**** site!). This behavior is new because my iPhone didn't redirect me before, safari used to crash instead.
It is now obvious to me that this is some kind of ad/phishing/malware-**** affecting iOS-devices surfing the web with Safari (maybe a webkit vulnarability?)
And now for the really weird stuff: It just happened that I restored and updated my phone to the newest OS! I did not set it up from a previous backup, I set it up as a new phone... Wasn't restoring supposed to fix my issue?!?
***?!?
No ideas left... I think I'm going to drop it and leave it like that. Whenever I want to visit failblog.org, I do it with Opera or with a desktop browser. This is the only solution for me which is constantly working. Maybe.
Regards,
elvirus