Why do so many posters in Travel - Germany block their Q & A sections?

And why are there so many new accounts which disappear within weeks -- days even -- of when they're created? Why would posters be afraid to be open and honest here?
Update: EDIT Sorry, it does relate to Travel - Germany because that is where I have seen all these blocked accounts...in Travel - Germany.
There are also often an inordinate number of thumbs down on what appear to be perfectly good (& relevant) answers. Go figure!
Update 2: @ Nelia: I only have ONE account here & have had it for years. It's quite easy to check by clicking on my name. Any other account(s) are false & have been reported to Yahoo as such.
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