In some cases, the WTS's teaches that committing an act that the Bible condemns is acceptable if it upholds a higher aim or principle.
One example of this is in the WTS position on lying.
Although the WTS teaches that in general one should not lie, "protecting the interests of God's cause" is a higher aim than always being truthful (6-1-60 WT, P 352)...and so in such a case one can go ahead and lie.
Incidentally, liars, aka "everyone who loves and practices lying" are classed with murderers, idolaters, abominable persons, etc., in the book of Revelation. (Rev 21:8; 26-27; 22:15)...Yet, according to the WTS, there is a heirarchy of commandments and aims involved. Lying is permissible if it upholds the higher aim of furthering God's cause (i.e., protecting the organization).
Conversely, the WTS teaches that the dietary rule regarding the eating of blood must be followed without exception. That the value of human life, or the aim of saving human life does not supercede the carrying out of this rule.
There are other instances where the WTS teaches a sort of heirarchy of commandments. This is just one.
But this principle is only selectively applied.