Earlier quoted context omitted.
Windows 8’s Flash whitelist goes black [1], turns on [2] Flash almost everywhere [1] did they just blacklist all Flash? [2] another way of saying betrayed, attacked, etc
If you are familiar with the terminology the title is completely factual and not at all exaggerated or controversial. A whitelist approach means only sites that have been specifically allowed(whitelisted) will be allowed to use flash, a blacklist approach means all sites will by default be allowed to use flash except those explicitly blocked(blacklisted).
If you're familiar with English you'll note that there are two entirely valid definitions to the sentence, as noted.
The negative meaning is particularly valid if you're familiar with Flash's history in recent years.