Wow - that's an impressive feature. (Wonder how much extra they charge for that?) Still, given my example of extra innings in ball games, it seems like their information would come from "unofficial" sources and the user would have to take everything with a grain of salt.
For me, it's easiest to simply avoid (course or altitude) these Sport TFR's (unless I'm talking to ATC). But the OP was about Alerts, not so much the TFR's themselves.