I'm not sure what level of sophistication goes into GA's anomaly detection, but if those spammy domains show up, then I'm guessing it's not that difficult to ca

I'm not sure what level of sophistication goes into GA's anomaly detection, but if those spammy domains show up, then I'm guessing it's not that difficult to cause much more damage using similar techniques. Scenario: I want to annoy / confuse / distract my competitor by making their analytics data less-effective (potentially totally unusable). I grab their tracking ID and send tons of fake events / requests / page views. Now my competitor can't really figure out what actual traffic they're getting and what's real and what's fake... Plus they spend time trying to figure out what's going on, clean up their data etc. It can go way beyond referring domains - think custom events, ecommerce tracking, site speed... anything that analytics tracks can be faked.