Pilot reported flying over a sporting event during a game and wondered if they had violated a tfr.

Attributes
ACN	1752803
Time
Date	202007
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Flight Plan	None
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 51 Flight Crew Total 1.6 Flight Crew Type 51
Events
Anomaly	Airspace Violation All Types Deviation - Procedural Published Material / Policy Deviation - Procedural FAR

Narrative:

I conducted a demonstration flight leaving ZZZ (home base) northbound for a scenic tour.I checked for tfrs on tfr.faa.gov and weather pertaining to my route of flight and timing; I did not notice anything unusual.while above a field I noticed the lights were on but the field was empty. I was approximately 1;800 feet MSL.upon landing; I checked the field's website and noticed a game took place that evening. I am concerned that even though the venue did not have near 30;000 people present as a result of the covid pandemic; the tfr was still in effect. I may have conflated a venue capacity of 30;000 people with 30;000 people present at the venue; a very distinct difference that could be a point of confusion for other pilots during the covid pandemic.my preflight action going forward will include a review of all major venues and scheduled events along my route of flight should I not be in contact with an air traffic control facility.

Original NASA ASRS Text

Title: Pilot reported flying over a sporting event during a game and wondered if they had violated a TFR.

Narrative: I conducted a demonstration flight leaving ZZZ (home base) northbound for a scenic tour.I checked for TFRs on tfr.faa.gov and weather pertaining to my route of flight and timing; I did not notice anything unusual.While above a field I noticed the lights were on but the field was empty. I was approximately 1;800 feet MSL.Upon landing; I checked the field's website and noticed a game took place that evening. I am concerned that even though the venue did not have near 30;000 people present as a result of the COVID pandemic; the TFR was still in effect. I may have conflated a venue capacity of 30;000 people with 30;000 people present at the venue; a very distinct difference that could be a point of confusion for other pilots during the COVID pandemic.My preflight action going forward will include a review of all major venues and scheduled events along my route of flight should I not be in contact with an Air Traffic Control Facility.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.