It is commonly referred to as information overload. An infosec professional throws out a wide net in hopes of stopping malware before it gets too deep into the network, but like a motion-sensor light, sometimes the alert catches a squirrel instead of a burglar.
Rob Kerr, chief technology officer at Haystax Technology, cited the 2013 breach at Target, as an example in which thieves stole some 40 million Target credit cards by accessing data on point of sale (POS) systems. Target later revised that number to include theft of private data for 70 million customers.
from CSO Online Data Protection http://www.csoonline.com/article/3191379/data-protection/false-positives-still-cause-alert-fatigue.html#tk.rss_dataprotection