Earlier quoted context omitted.
Often, at least in the work contexts, it doesn't matter if they can be gamed. Validity testing is done with the effects of gaming built-in, and there is some evidence that gaming has relations with performance benefits. A acquaintance of mine is finishing his dissertation on faking on personality and integrity tests, so I'll know more on that soon.
Yes, but in that context gaming is known and accounted for. My definition of gaming was manipulation without the proctor or evaluation showing any statistically significant deviation, which is virtually impossible on modern personality tests. The "gaming" becomes transparent and used to score the candidate, if it's present at all.
However I question your absolute statement. What man can create, man can circumvent. (How's that for an absolute statement?)
Would you say that the people who created the test cannot game it?