Gambling Related Keywords Offering No Suggestions In Keyword Tool

Reported at WebmasterWorld, it appears that the Google keyword tool is blocking displaying suggested keywords for some gambling related terms.

For example, if you try plugging in [casino] into the tool, Google will not suggest any other related terms. Here is a screen shot:

I've tried this being signed in as well and it made no difference.

I am not sure if this is a new thing, a bug or intentional.

One AdWords advertiser was upset to not be able to use the tool to find related keywords. He asked:

Apparently Google has applied some kind of block for gambling keywords. Does anyone know of a setting that would get around this restriction?

I've tried that checking 'Include adult ideas' does not work.

Any ideas?

Forum discussion at WebmasterWorld.