有很多惡意軟體 (像是 malware) 會透過合法的 ad network 散布，然後竊取資料，甚至是透過麥克風監聽環境音：
I write to urge the Office of Management and Budget (OMB) to protect federal networks from foreign spies and criminals who misuse online advertising for hacking and surveillance, by setting clear new rules for agencies in its forthcoming “zero trust” cybersecurity policy.
I have pushed successive administrations to respond more appropriately to surveillance threats, including from foreign governments and criminals exploiting online advertisingto hack federal systems. This includes seemingly innocuous online advertisements, which can be used to deliver ‘malware to phones and computers—often without requiring users to click anything. This ‘malware can steal, modify or wipe sensitive government data, or record conversations by remotely enabling a computers built-in microphone.
In the next few weeks, uBlock Origin will be the first add-on to become available in the new Firefox for Android. It is currently available on Firefox Preview Nightly and will soon be available on Firefox for Android Nightly.
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